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HT Pulleys - Sigalsub
The Sigalsub HT Pulleys are high-quality technical components designed and manufactured in Sigalsub’s workshops to equip spearguns with a compound pulley system. Sold in pairs, they are the ideal solution for anyone looking to build or upgrade their speargun with a high-power, high-precision Inverter or Roller Speargun/Inverter propulsion system.
Construction and Materials
Each pulley block consists of two stainless steel plates connected by two axles made from the same material, ensuring maximum corrosion resistance and structural strength in marine environments. The frame can be disassembled using Allen screws, making maintenance and component replacement easy.
- Structure: two stainless steel plates with dual through-axles
- Pulley: equipped with a self-lubricating POM roller to reduce friction and ensure smooth line travel
- Disassembly: fully disassemblable frame via Allen screw
- Origin: designed and manufactured entirely by Sigalsub — Made in Italy
Operation in the Compound System
The pulley block system allows the pairs of bands to be connected on one axle while the line runs on the other, through the POM pulley. This mechanism multiplies the force of the bands, allowing easier loading while delivering significantly greater shooting power than traditional spearguns.
- The pairs of bands are connected to one axle (handle side)
- The line running to the muzzle slides over the other axle
- Correct positioning is achieved by routing the band line loops so that the pulley blocks remain parallel to the barrel, preventing scratches and friction
Compatibility
The Sigalsub HT Pulleys were developed specifically for the Nemesis HT speargun, Sigalsub’s flagship Roller-Inverter system, and are compatible with spearguns with 26/28 mm barrels. They are ideal for compound setups with two or three pairs of bands.
- Compatible with the Sigalsub Nemesis HT speargun
- Suitable for spearguns with Inverter and Roller Speargun/Inverter propulsion systems
- Can be used to build or upgrade custom spearguns with a compound pulley system
KTT Kit - Sigalsub
The Sigalsub KTT Kit is the complete solution for anyone looking to set up or upgrade the muzzle of their speargun with original Sigalsub components, one of Italy’s leading brands for spearfishing and the production of high-performance accessories. Sigalsub is renowned for the quality of its materials, meticulous attention to detail, and entirely Made in Italy production.
Complete kit for Sigalsub muzzle
The KTT Kit is designed to ensure maximum compatibility and reliability with Sigalsub Tahitian shafts, providing all the components needed for correct, high-performance assembly. Ideal both for an initial setup and for replacing or upgrading existing gear.
Sigalsub quality and philosophy
Sigalsub is a modern artisan company that combines precision machining, state-of-the-art equipment, and hand assembly, ensuring quality control on every single component. All products are engineered, field-tested, and introduced to the market only after a careful technical development phase. Material selection, finishes, and attention to detail are the hallmark of every Sigalsub kit and accessory.
Compatibility
- Compatible with Sigalsub Tahitian shafts in the current range
- Suitable for spearguns with open muzzle and closed muzzle
- Components designed to work in synergy with Sigalsub bands (Reactive, Extreme, Dynamic line)
Why choose Sigalsub
- 100% Made in Italy production, either in-house or through specialized companies in the sector
- Selected materials: heat-treated Sandvik steel, technical nylon, high-quality stainless steel
- Hand-finished for maximum quality and reliability in saltwater
- Components tested and approved by the Sigalsub professional team
- Wide range of compatible accessories to customize and optimize your speargun’s performance
Barrel Adapter - Sigalsub
The Sigalsub barrel adapter is an essential component for mounting Sigalsub roller muzzles — and other compatible components — on spearguns with a cylindrical barrel. Designed with the same craftsmanship that distinguishes all Sigalsub production, it ensures a precise, stable, and watertight fit between muzzle and barrel.
Two sizes for maximum compatibility
Sigalsub adapters are available in two distinct diameters, designed to cover most commercial spearguns on the market:
- Internal diameter 26.0 mm — compatible with Seac, Pathos, Salvimar, Cressi spearguns and other models with a 26 mm barrel
- Internal diameter 25.4 mm — compatible with Seatec, Omer spearguns and other models with a 25.4 mm barrel
Technical features
- Specific component for mounting Sigalsub roller muzzles on cylindrical barrels
- Available in two diameter versions: 26.0 mm and 25.4 mm
- System with double O-ring seals for reliable watertight sealing
- Precision construction, in line with Sigalsub quality standards
- Essential accessory for converting your band speargun to a roller setup
What it’s for
Sigalsub roller muzzles come standard with the 26.0 mm adapter. This separate adapter is required for spearguns with a 25.4 mm internal diameter barrel (e.g., Seatec, Omer), or as a replacement part. It lets you take full advantage of the roller muzzle’s performance — more powerful shots and greater band stretch — even on band spearguns with different geometries.
Muzzle 610 Roller Speargun - Sigalsub
The Sigalsub 610 Roller Speargun Muzzle is a high-performance component for band spearguns for spearfishing, designed to convert a classic band speargun into an efficient Roller Speargun system. Thanks to its roller block technology, it delivers greater shot power, increased range, and reduced recoil for the same barrel length.
Roller Speargun technology: more power, less recoil
The roller system uses a longer band stretch than a traditional setup, generating significantly higher speed and kinetic energy. The result is a more stable shot, with drastically reduced recoil and a sight line that is maintained more accurately even with high-tension bands. Ideal for challenging fish and long-range shots.
Technical features
- High-sliding roller blocks for maximum band travel smoothness
- Stainless steel stopper shaped for the shaft-locking nylon line passage
- Central body made of glass-fiber-reinforced plastic material for high mechanical strength
- Compatible with most 28 mm cylindrical barrels with external diameter available on the market
- Included: 26 mm adapter (compatible with Seac, Pathos, Salvimar, Cressi, etc.) with a double gasket system for a watertight seal — also available in a 25.4 mm version (Seatec, Omer, etc.)
- Side front line guide, usable on both the right and left side for maximum flexibility
- Band capacity up to 16.0 mm diameter
- Included: stainless steel pin for securing the bands and stainless steel hook for building the loading aid
- Available in military green and black versions
Compatibility and versatility
The Sigalsub 610 Roller Speargun Muzzle is designed to fit a wide range of commercial spearguns with tubular barrels, thanks to its interchangeable dual-adapter system. It allows you to upgrade your existing band speargun to a roller system without having to buy a new speargun, with simple, straightforward installation.
Italian build quality
Produced by Sigalsub, an Italian company specialized in designing high-performance spearfishing equipment, the 610 Muzzle is built for reliability, durability, and precision even during the most demanding spearfishing sessions.
Muzzle 610 Roller Speargun - Sigalsub
The Sigalsub 610 Roller Speargun Muzzle is a high-performance component for band spearguns for spearfishing, designed to convert a classic band speargun into an efficient roller system. Thanks to its roller-block technology, it delivers greater shooting power, longer range, and reduced recoil with the same barrel length.
Roller Speargun technology: more power, less recoil
The roller system uses a longer band stretch than a traditional setup, generating significantly higher speed and kinetic energy. The result is a more stable shot, with drastically reduced recoil and a more precise sight line even with high-tension bands. Ideal for challenging fish and long-range shots.
Technical features
- High-sliding roller blocks for maximum band travel smoothness
- Stainless steel stopper shaped to allow the shaft-locking nylon line to pass through
- Central body made of glass fiber-reinforced plastic material for high mechanical strength
- Compatible with most 28 mm cylindrical barrels with an external diameter available on the market
- Included: 26 mm adapter (compatible with Seac, Pathos, Salvimar, Cressi, etc.) with a double O-ring system for watertight sealing — also available in a 25.4 mm version (Seatec, Omer, etc.)
- Side front line passage, usable on either the right or left side for maximum flexibility
- Band capacity up to 16.0 mm in diameter
- Included: stainless steel pin for securing the bands and a stainless steel hook for making the loading aid
- Available in military green and black versions
Compatibility and versatility
The Sigalsub 610 Roller Speargun Muzzle is designed to fit a wide range of commercial spearguns with tubular barrels, thanks to its interchangeable dual-adapter system. It lets you upgrade your existing band speargun to a roller system without having to purchase a new speargun, with simple, straightforward installation.
Italian build quality
Manufactured by Sigalsub, an Italian company specialized in designing high-performance spearfishing equipment, the 610 Muzzle is built for reliability, durability, and precision even during the most demanding spearfishing sessions.
Muzzle 610 with Bearing Pulleys - Sigalsub
The Sigalsub Muzzle 610 with bearing pulleys is the benchmark roller solution for anyone looking to convert or upgrade their tube speargun with a high-performance system. Part of the renowned Sigalsub Roller Speargun Line, this muzzle is designed to ensure maximum line travel, greater shot power, and long-lasting durability, even in the most demanding spearfishing conditions.
High-Smoothness Bearing Technology
The standout feature of this muzzle is its pulley system with double radial bearings made from a non-metallic technical material, with 316 stainless steel balls. The bearings are equipped with an outer cover that prevents sand, seaweed, and debris from entering between the balls, ensuring consistently perfect, friction-free rolling. The dynamic load rating of over 45 kg guarantees reliability and strength even with high-tension bands.
Construction and Materials
- Central body made from glass-fiber-reinforced plastic material for high mechanical strength
- Stainless steel stopper for maximum strength and resistance to marine corrosion
- Double integrated watertight O-ring seal for perfect barrel sealing
- Pulleys with double radial bearings and 316 stainless steel balls with dynamic load >45 kg
- Available in black and military green
Compatibility and Installation
The Muzzle 610 is designed for direct installation on any commercial female tubular-section barrel. It fits barrels with an internal diameter of 26 mm (compatible with Seac, Pathos, Salvi, Cressi, and others) and is also available with a 25.4 mm adapter for Seatec, Omer, and similar barrels. The fastening system is quick and simple using a self-tapping screw.
- Compatible with barrels with Ø 26 mm internal diameter (standard)
- Ø 25.4 mm adapter available separately
- Bilateral side line passage: can be used on either the right or left side
- Fastening with included self-tapping screw
- Compatible with bands up to 16 mm in diameter
Complete Kit Included
The muzzle comes complete with everything needed for installation and immediate setup on your speargun:
- Complete roller speargun muzzle with bearing pulleys
- Two burnished stainless steel hooks for band pre-tensioning
- Burnished line guide
- Mounting hardware
- Instruction sheet with step-by-step installation instructions
Advantages of the Roller Speargun System
The roller system allows you to use the full working length of the barrel for band propulsion, unlike a classic traditional speargun, which uses only part of it. The result is greater shot power for the same speargun length, or the option to use a shorter barrel while maintaining the same ballistic effectiveness. The Muzzle 610 is the ideal choice for anyone looking for a reliable Made in Italy component designed specifically for the needs of professional and recreational spearfishing.
Muzzle 610 with Bearing Pulleys - Sigalsub
The Sigalsub Muzzle 610 with bearing pulleys is the benchmark Roller Speargun solution for anyone looking to convert or upgrade their tube speargun with a high-performance system. Part of the renowned Sigalsub Roller Speargun Line, this muzzle is designed to ensure maximum line glide, increased shooting power, and long-lasting durability, even in the most demanding spearfishing conditions.
High-Glide Bearing Technology
The standout feature of this muzzle is its pulley system with dual radial bearings made from non-metallic technical material, with 316 stainless steel balls. The bearings feature an external cover that prevents sand, seaweed, and debris from entering between the balls, ensuring consistently perfect, friction-free rolling. The dynamic load rating of over 45 kg guarantees reliability and strength even with high-tension bands.
Construction and Materials
- Central body made of glass fiber-reinforced plastic material for high mechanical strength
- Stainless steel stopper for maximum robustness and resistance to marine corrosion
- Integrated dual watertight O-Ring for perfect barrel sealing
- Pulleys with dual radial bearings and 316 stainless steel balls with dynamic load >45 kg
- Available in black and military green
Compatibility and Installation
The Muzzle 610 is designed for direct fitting onto any commercial female tubular-section barrel. It fits barrels with an internal diameter of 26 mm (compatible with Seac, Pathos, Salvi, Cressi, and others) and is also available with a 25.4 mm adapter for Seatec, Omer, and similar barrels. The fastening system is quick and simple using a self-tapping screw.
- Compatible with barrels with Ø 26 mm internal diameter (standard)
- Ø 25.4 mm adapter available separately
- Bilateral side line routing: can be used on either the right or left side
- Fastening with included self-tapping screw
- Compatible with bands up to 16 mm in diameter
Complete Kit Included
The muzzle comes complete with everything needed for installation and immediate setup on your speargun:
- Complete roller muzzle with bearing pulleys
- Two burnished stainless steel hooks for band pretensioning
- Burnished line guide
- Mounting hardware
- Instruction sheet with step-by-step assembly instructions
Benefits of the Roller Speargun System
The roller system allows you to use the full working length of the barrel for band propulsion, unlike a classic traditional speargun, which uses only part of it. The result is greater shooting power for the same speargun length, or the ability to use a shorter barrel while maintaining the same ballistic performance. The Muzzle 610 is the ideal choice for anyone looking for a reliable Made in Italy component designed specifically for the needs of professional and recreational spearfishing.
Stark Muzzle for Tube Speargun - Sigalsub
The Stark muzzle by Sigalsub is a versatile solution designed for tube spearguns with an internal diameter of Ø 26 mm. Thanks to its modular architecture, it adapts to both roller and inverter systems and classic speargun configuration, making it one of the most versatile accessories in the Sigalsub spearfishing line.
Compact Design and Robust Construction
Despite its extremely compact size and low weight, the Stark muzzle does not compromise on strength. The stainless steel stop system ensures excellent solidity even under the elastic bands’ traction loads, delivering consistent performance over time.
Roller Speargun System and Speargun Configuration
- Compatible with all invert/roller systems for spearfishing spearguns
- Easily convertible into a classic speargun muzzle by removing the pin and pulleys
- High-smoothness pulley mounting system for optimal power transfer
- Stainless steel stopper for maximum durability and resistance to marine corrosion
Line and Reel Management
- Bilateral line retainer: supports on both the right and left side to suit any handle configuration
- Dedicated line guide eyelet for the reel line
- Optimized to ensure smooth running and reduced friction during retrieval
Watertight Seal and Installation
- Double O-Ring for a perfect watertight seal of the speargun barrel
- Quick fastening with a self-tapping screw
- Compatible with barrels with an internal diameter of Ø 26 mm
Included Accessories
- Pair of plastic knot-saver discs included, designed to protect the stainless steel stopper from direct impacts from the wishbone knot
Wrist Hook - Sigalsub
The Sigalsub wrist hook is an essential accessory for anyone using band spearguns with a roller, pulley-assisted, or inverter system. Designed to make loading pre-tensioned bands easier and safer, this tool is fundamental for every spearfishing session, especially with spearguns featuring high propulsive load.
Composition and Materials
- Corrosion-resistant stainless steel hook, built to withstand use in marine environments
- Wrist bracelet in black rubber, for secure and comfortable anchoring during loading
- High-strength dyneema-coated internal cord
- Compact, lightweight construction, easy to stow with your freediving gear
How It Works
The wrist hook is worn on the wrist using the rubber bracelet. When loading a roller or pulley-assisted band speargun, the stainless steel hook is attached to the dyneema wishbone that connects the bands. By pulling with your arm, you bring the band into pre-load, extending the grip point and allowing you to comfortably reach the wishbones with your other hand for positioning on the loading notches.
Benefits
- Makes loading roller bands significantly easier, even under high tension
- Reduces the physical effort required when loading the speargun
- Allows you to load in stages, increasing control and safety
- Ideal for large-diameter bands and high-power systems
- Quality Made in Italy accessory, manufactured by Sigalsub
Compatibility
The Sigalsub wrist hook is compatible with all band spearguns equipped with roller, pulley-assisted, or inverter systems that use dyneema wishbones to connect the bands. It pairs perfectly with the entire range of Sigalsub spearguns and accessories.
Kit 2 Pre-Tensioning Hooks + Line Guide - Sigalsub
The Sigalsub Kit 2 Pre-Tensioning Hooks + Line Guide is the complete solution for converting and optimizing roller and inverted roller spearguns. Made from high-quality stainless steel, the components in this kit ensure corrosion resistance, reliability in the water, and long-lasting durability.
What’s included in the kit
- 2 flat pre-tensioning hooks in stainless steel, for anchoring pre-tensioned bands to the speargun barrel
- 1 line guide in stainless steel, a pre-drilled plate with a loop for proper line management and guidance on roller spearguns
- Stainless steel mounting screws included in the package
Function and technical advantages
The pre-tensioning hooks attach to the underside of the speargun barrel and allow pre-tensioned bands to be hooked in place, both on roller and inverted roller systems. By positioning multiple hooks in sequence along the barrel, you can:
- Adjust the level of band pre-tension
- Split and distribute the lower loading load
- Make upper band loading easier
- Quickly manage the speargun power according to fishing conditions
The line guide ensures an optimal, friction-free path for the line, preventing snags during the shot and maintaining the accuracy of the propulsion system.
Compatibility
The kit is compatible with wood, aluminum, and carbon railguns equipped with roller or inverter systems. The hooks fasten directly to the barrel using the supplied stainless steel screws, with no need for complex structural modifications.
Materials
- Hooks and line guide in stainless steel — maximum resistance to saltwater corrosion
- Mounting screws included in stainless steel
- Precision machining for a safe and stable installation
Installation notes
- Position the hook at the desired point on the speargun barrel.
- Drill the barrel at the selected mounting point.
- Fasten the hook using the supplied stainless steel screw.
- Repeat the procedure for the second hook in the optimal position.
- Install the line guide in the correct position to guide the line without friction.
Side Guards for Roller Speargun - Sigalsub
The Sigalsub side guards for Roller Speargun are original spare parts designed specifically for the roller muzzles in the Sigalsub line. These components perform an essential function in the speargun’s roller system: they protect and correctly guide the band during loading and shooting, ensuring precise and reliable muzzle operation.
Compatibility and Use
The side guards are replacement accessories dedicated to the Sigalsub Roller Speargun line, designed for those who want to keep their roller muzzles in perfect working order or for those assembling or customizing their speargun with original components from the Italian brand. Sigalsub is a high-precision artisan company specializing in the production of components for spearfishing, and every spare part is made with the same construction care as the main products.
Main Features
- Original Spare Part Sigalsub for roller muzzles
- Side guide and protection function for the roller band
- Integral part of the roller system for spearguns
- High-precision Italian artisanal production
- Compatible with the roller muzzles of the Sigalsub line
The Sigalsub Roller Speargun System
The Sigalsub roller system is recognized in the spearfishing sector for its build quality and the variety of available solutions: muzzles with plastic wheels, with a special-material axle, and with ball bearings. The side guards are a key component for maintaining the efficiency and precision of this system over time.
Aluminum Stopper Roller Speargun Line - SigalSub
The SigalSub aluminum stoppers are original spare components designed for the roller muzzles of the Sigalsub Roller Speargun Line. Sold as a pair, these stoppers perform a key mechanical function: stopping the wishbone knot of the bands during the shot, ensuring precision, safety, and reliability every time you head out to sea.
Material and Construction
Made from Anticorodal aluminum, an alloy with high mechanical strength and corrosion resistance, these stoppers receive a hard anodizing treatment that prevents the alloy from oxidizing, even with prolonged use in the marine environment. The result is a durable, lightweight component that maintains performance over time.
Compatibility
The SigalSub aluminum stoppers are official components of the Sigalsub Roller Speargun Line and integrate with the roller muzzles and roller kits produced by the Italian company. They are the ideal Spare Part for replacing worn stoppers on muzzles equipped with the aluminum version.
Why Choose Original SigalSub Stoppers
- Anticorodal aluminum with hard anodizing treatment for maximum resistance to marine corrosion
- Sold as a pair: a complete set for immediate replacement on both sides
- Original SigalSub component, manufactured in-house by the Italian company to ensure quality and perfect tolerances
- Precise and reliable band stop function in the roller system
- Low weight thanks to aluminum, without compromising mechanical strength
- Essential Spare Part for maintaining the optimal performance of the roller muzzle over time
Roller Pulleys - SigalSub
The SigalSub roller pulleys are replacement and upgrade components specifically designed for roller system band spearguns. Sold as a pair, they are an integral part of the SigalSub Roller Speargun Line and stand out for their internal roller, which reduces band friction during loading and shooting, ensuring smoother operation compared to standard pulleys.
Roller Speargun Technology: Why Pulleys Make the Difference
In roller spearguns for spearfishing, the muzzle pulleys redirect the bands underneath the barrel as well, increasing the effective propulsion stroke. Pulley quality directly affects shaft exit speed, shooting power, range, and loading smoothness. SigalSub roller pulleys optimize this energy transfer, minimizing load loss and ensuring consistent performance dive after dive.
Technical Features
- Type: roller pulleys with internal rotating core
- Pulley outer diameter: mm 26
- Pulley groove diameter: mm 20
- Packaging: pair (2 pulleys)
- Construction: corrosion-resistant materials, suitable for saltwater use
- Compatibility: muzzles and roller kits from the SigalSub Roller Speargun Line
Performance and Benefits
- Reduced friction: the internal roller allows the bands to slide smoothly, reducing energy loss compared to standard pulleys
- Greater power and speed: optimized energy transfer results in smoother, more powerful, and more accurate shots
- Corrosion resistance: robust construction suitable for prolonged use in marine environments
- Direct upgrade: ideal replacement part for upgrading or replacing existing pulleys on SigalSub roller muzzles
- Reliability: consistent performance under pressure, even during deep-water spearfishing sessions
Who They Are For
These pulleys are the reference replacement part for anyone who owns a SigalSub roller band speargun and wants to restore or improve the performance of their equipment. They are also the ideal choice for those who want to build or customize a roller muzzle to their specifications, pairing them with axle pins, stoppers, and kits available in the SigalSub Roller Speargun Line.
Axle for Line Roller Speargun Pulleys 6mm - Sigalsub
The 6mm Sigalsub pulley axle is the original Spare Part for the Sigalsub Roller Speargun Line, designed to ensure proper pulley operation in roller muzzles for spearfishing spearguns. Made from stainless steel, it provides maximum corrosion resistance in marine environments and long-lasting durability, even with intensive use.
Compatibility and available versions
The axle is available in two lengths to fit different Sigalsub roller muzzle configurations:
- Diameter: 6 mm
- Short version length: 57 mm
- Long version length: 75 mm
- Material: Stainless steel (Inox)
- Compatible with Sigalsub Roller Speargun Line pulleys (plain, roller, and glass ball bearing versions)
Use and application
This component is essential for the correct assembly and maintenance of Sigalsub roller muzzles. Roller muzzles are designed to be mounted on barrels from different manufacturers and are available in versions with burnished stainless steel stoppers, anodized anticorodal aluminum, and carbon. The 6mm axle ensures proper alignment and smooth pulley rotation, a key factor in the shooting performance of the roller system.
Sigalsub quality
Sigalsub is an Italian artisan company that combines precision mechanical machining with manual quality control on every component. Careful material selection, especially of stainless steels, is one of the brand’s priorities to ensure reliability and high performance in all underwater use conditions.
- Original Spare Part Sigalsub
- Stainless steel construction resistant to marine corrosion
- Ideal for maintenance and restoration of roller muzzles
- Precision mechanical machining
Adapter for Cylindrical Barrels with 26 mm Internal Diameter
This adapter is designed to allow the installation of roller muzzles or other components on cylindrical barrels with an internal diameter of 26 millimeters. It is specifically made to ensure a stable and precise interface between the barrel and accessories for spearfishing and freediving.
Compatibility with tubes with a 26 mm internal diameter makes this adapter an essential component for assembling and customizing spearguns, ensuring a reliable and secure fit.
Roller Speargun and Inverter Accessories for Spearguns
Spearguns with Roller Speargun and inverter systems represent one of the most significant technical evolutions in spearfishing in recent decades. Compared to traditional band spearguns, these systems modify the attachment point and routing of the bands, distributing thrust forces differently and changing the power profile during loading and firing. The result is different ballistic behavior, with direct implications for range, trajectory, and shaft impact force.
This section includes all Roller Speargun and inverter accessories for spearguns: complete muzzles, pulleys, blocks, loading aids, stoppers, anchor bases, frames, and conversion kits. The products available allow both the new setup of a speargun with a Roller Speargun or inverter system, and the replacement of worn components or customization of existing configurations.
Product Types
Roller Speargun Muzzles
Roller Speargun muzzles are the main component of the system. Available in single and double versions, they mount on the front of the speargun and determine the number of active pulleys and, consequently, the force multiplier applied to the bands. Single muzzles are used on one- or two-band configurations, while double muzzles are used when you want to maximize the available power on spearguns with greater mass and length. Each muzzle is available in different versions and with different bearing types: crystal ball bearings or ceramic ball bearings.
Inverter Muzzles and Inverter Kits
The inverter system differs from a simple Roller Speargun in the geometry of the band routing. In this configuration, the bands contract in the opposite direction compared to a classic band speargun (hence the name inverter). The band anchor point is in fact under the speargun and in the reel area, rather than at the muzzle. The available inverter kits include the muzzle, guide pulleys, and the fastening components needed to complete the conversion. Kits are available for both cylindrical barrels and wooden stocks.
Pulleys
Pulleys are the components that guide the routing of the bands (or the line connected to them) within the Roller Speargun or inverter system. Available in different types—ceramic, crystal, standard versions, and with ball bearings—they determine how smoothly the band runs during loading and firing. Ceramic pulleys stand out for the hardness of the material, which reduces friction wear over time, while crystal pulleys offer a consistent resistance profile at an affordable cost. Pulleys are offered individually or in pairs, with different diameters depending on compatibility with the type of speargun or desired system.
Blocks
Blocks are redirecting devices used in inverter systems or vela systems, where they change the direction of band travel. This category includes Hard blocks (with a rigid structure), available in 3-, 5-, and 7-anchor-point formats, in ceramic variants or with sliding movement.
Conversion Kits and Accessory Components
Available accessories also include pulley containment side plates, pre-tensioning bases and hooks , loading aids (or load assist devices) to make loading Roller Speargun spearguns easier, muzzle stoppers that allow shaft release, and reel mount bases compatible with Roller Speargun and inverter systems. These components complete the Roller Speargun and inverter speargun setup.
How to Choose Roller Speargun and Inverter Accessories
The choice of Roller Speargun and inverter accessories depends on three main variables: the type of speargun you own, the system already installed or that you intend to install, and the conditions of use at sea.
Speargun Compatibility
Before any purchase, it is necessary to check the barrel diameter and the type of muzzle on the speargun. Many Roller Speargun conversion kits and muzzles are designed for cylindrical barrels of specific diameters—typically with internal diameters ranging from 24 to 26.5 millimeters—and are not interchangeable between different formats. Likewise, inverter kits for wooden stocks have different construction characteristics compared to those for cylindrical aluminum or carbon barrels.
Single or Double Roller Speargun System
The choice between a single Roller Speargun muzzle and a double Roller Speargun muzzle directly affects the force multiplier applied to the bands. A double Roller Speargun configuration uses two pairs of active pulleys instead of one, allowing twice as many bands to be used at the same length. The double Roller Speargun muzzle is generally used on spearguns over 100 cm in length, intended for hunting large pelagics or bottom species that require long shooting distances.
Ceramic or Crystal Bearings
The difference between pulleys and muzzles with ceramic bearings and crystal bearings concerns service life and resistance to the marine environment. Ceramic bearings are made of zirconium oxide or silicon nitride, materials that resist saltwater corrosion and maintain smoother rotation over the long term. Crystal bearings (borosilicate glass or similar) offer comparable performance in the early stages of use but tend to degrade more quickly in high-salinity environments. The choice of bearing type therefore affects the required maintenance frequency.
Support Accessories
For spearfishers who use high-powered Roller Speargun spearguns, the use of a loading aid or load assist device is recommended because it reduces the muscular effort required during loading. The reel mount base compatible with Roller Speargun and inverter systems allows the reel to be integrated directly onto the speargun without interfering with the band routing.
Available Brands
This section includes products from the following specialized brands:
- MannySub: this Australian brand offers single and double Roller Speargun muzzles of the highest quality level in terms of strength and functionality. Available with ceramic and crystal bearings, in multiple variants to fit all speargun models on the market.
- Ermes: offers a complete line of ceramic Roller Speargun and inverter pulleys, Hard blocks in different versions, double Croclock hooks, and stopper tubes for Roller Speargun spearguns.
- Contesub: available with complete inverter kits, anchor bases, LP and Invert 37 pulleys, Spear Truck blocks, reel base for Roller Speargun and inverter systems, and conversion kits.
- Pathos: offers Sniper Roller Speargun kits and standard Roller Speargun kits with muzzle and stabilizer included in the package.
- Rob Allen: available with ceramic Roller Speargun muzzle and loading aid for Roller Speargun systems.
- Salvimar: offers Roller Speargun muzzles in the standard version.
- Sigal Sub: offers pulleys, muzzles, and accessories for Roller Speargun and inverter systems.
- Hunt: presents a complete line of accessories for Roller Speargun and inverter systems.
Conclusion
Roller Speargun and inverter accessories for spearguns are a specific technical segment, where material quality and the manufacturing precision of individual components directly affect the operation of the entire system. The choice between single and double muzzles, between ceramic and crystal bearings, between complete kits and individual replacement components, depends on the type of speargun available, the type of spearfishing practiced, and frequency of use.
The products available in this section cover the entire Roller Speargun and inverter setup range for spearfishing, with specialized brands offering solutions for different configuration levels, from basic conversion kits to more complex vela and inverter systems.
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