The RetroArms cut-off lever spring is designed for version 2 gearboxes in rifles of the M4/M16/AR15 series. Useful when replacing a weakened or lost spring.

Features

• Compatible with V2 gearboxes (M4/M16/AR15 series)

The RetroArms gearbox shell is designed for SR25 replicas with a quick spring change system. It is CNC-machined from EN AW 7075 T651 aluminum (duralumin) with protective anodizing against corrosion, a material stronger than ordinary steel (590 MPa versus 390 MPa).

Features

• CNC-machined 7075 T651 aluminum, anodized
• For 8 mm bushings/bearings
• Quick spring change system

Specifications

• Weight: 170 g
• Color: black

Package Contents

• Gearbox shell
• Spring guide
• Mounting screws

The RetroArms split gearbox shell is made of two parts (upper and lower), which makes assembling and adjusting the internal parts easier and faster. It is CNC-milled from AW 7075 T651 duralumin (590 MPa) and is designed for version 2 gearboxes (M4, M16, AR-15, etc.) to the Tokyo Marui standard.

Replacing internal parts, including the gearbox shell, should be carried out by a qualified technician.

Features

• Two-part split design
• CNC-milled 7075 T651 duralumin
• For 8 mm bushings/bearings
• Quick spring change system
• Not compatible with the MAXX cylinder head

Specifications

• Weight: 142 g

Package Contents

• Gearbox shell
• QSC spring guide
• Screws
• Bushings/bearings not included

The Retroarms Type C CNC body in a skeletonized design is inspired by the receivers of real AR15 (M4) firearms. It is milled from EN AW 7075 T651 aluminum (duralumin), a material stronger than ordinary steel, and protected against corrosion by anodizing.

Features

• EN AW 7075 T651 aluminum, CNC-milled
• Protective anodizing against corrosion
• Skeletonized design
• Standard 20 mm top rail (MIL-STD-1913)
• Compatible with M4/AR15 airsoft replicas

Specifications

• Material strength: 590 MPa (versus 390 MPa for ordinary steel)
• Weight: 422 g
• Color: black

The Retroarms New Gen CNC body for M4/AR15 is milled from a solid block of aircraft-grade EN AW 7075 T651 aluminum (duralumin), a material stronger than ordinary structural steel. Inspired by the receivers of real firearms, it offers far greater durability than zinc-aluminum alloy cast bodies, at a low weight.

Features

• EN AW 7075 T651 aluminum, CNC-milled, blasted with synthetic corundum and hard anodized against corrosion
• Standard 20 mm top rail (MIL-STD-1913)
• Upper and lower joined by wedge pins secured with a screw, eliminating play between them
• Center pin secured with a screw
• Spring-loaded dust cover, normally closed, with easy access to the hop-up chamber
• M31.5x1.5 handguard thread, compatible with handguards from other manufacturers
• Compatible with standard Tokyo Marui outer barrels, grips and accessories
• Stock adapter for any standard TM AR15 or QSC buffer tube
• Rubber pads to reduce metallic noise when firing
• Extra space for wiring toward the handguard and a mechanism for horizontal gearbox alignment
• Protrusion to guard against accidental magazine release
• Upper and lower receivers from other manufacturers are not interchangeable
• Installation requires knowledge and experience; maximum screw tightening torque 1 Nm
• Recommended with the Retroarms V2 gearbox

Specifications

• Material: EN AW 7075 T651 aluminum (590 MPa versus 390 MPa for ordinary steel)
• Weight: 465 g
• Color: black

Package Contents

• CNC lower and CNC upper
• CNC wedge pins
• CNC stock adapter
• CNC center pin
• CNC forward assist
• Dust cover with pin and spring
• Forward assist spring
• Screw set

Retroarms POM tappet plate for version 2 gearboxes, an internal replacement part for the gearbox of electric airsoft rifles. The tappet plate controls the movement of the nozzle and the correct feeding of BBs, playing an important role in the timing of the firing cycle. It is a suitable choice for repairs or for replacing a worn part.

Features

• Made of POM
• Compatible with version 2 gearboxes

The RetroArms piston with 14.5 steel teeth is a durable upgrade part for the gearbox of AEG replicas, suitable for demanding setups.

Features

• 14.5 steel teeth

The RetroArms M110 spring is made of SiCr steel and has progressive winding, which ensures smoother gearbox operation. It is intended for tuning AEG airsoft replicas.

Features

• Material: SiCr steel
• Progressive winding

Specifications

• Spring type: M110

The Retroarms tappet plate spring set lets you adjust the return of the tappet plate in the gearbox of your electric airsoft rifle. It includes three different stiffness levels so you can choose the right one for your replica configuration.

Features

• Metal construction
• Set with three stiffness levels: soft, medium and hard
• Compatible with M4/AK series electric rifles and compatible models

The RetroArms Next Gen piston with 14.5 steel teeth is the new generation of the RetroArms piston, designed for AEG gearboxes in demanding setups.

Features

• 14.5 steel teeth
• Next Gen version

The RetroArms spring guide stopper is CNC-machined and designed for M249 series rifles. It holds the spring guide in the correct position.

Features

• CNC machining
• For M249 series

The RetroArms V2 Blue Edition complete gearbox has a CNC-machined shell and is equipped with high-quality components, including a Pandora 16:1 gear set and a Jefftron Leviathan V2 MOSFET. A complete solution for a major upgrade of an airsoft electric replica.

Features

• CNC construction
• RetroArms Pandora 16:1 SS gear set (3 mm)
• Jefftron Leviathan V2 MOSFET
• Dean T connector

Specifications

• Weight: 362 g

Package Contents

• RetroArms Pandora 16:1 SS gear set (3 mm)
• RetroArms 8 mm bearings
• RetroArms stainless steel shims
• RetroArms type C cylinder
• RetroArms standard cylinder head
• RetroArms reinforced nylon piston 14.5
• RetroArms nozzle
• RetroArms tappet plate
• RetroArms delayer chip
• RetroArms anti-reversal
• RetroArms A1 piston head
• RetroArms selector plate
• RetroArms type J trigger
• Jefftron Leviathan V2
• Dean T connector

The RetroArms cylinder head is CNC-machined and designed for version 2 and 3 gearboxes. The cylinder head closes the cylinder at the front and seals against the piston and nozzle, directly affecting compression.

Features

• CNC-machined
• Compatible with V2/V3 gearboxes

Specifications

• Weight: 8 g

The selector plate transmits the fire selector position to the gearbox contacts. This model is designed for V2 gearboxes and is a suitable replacement part for repairs or maintenance.

Features

• Compatible with V2 gearboxes

The RetroArms polymer piston has 8 steel teeth and is designed for short piston stroke setups.

Features

• Polymer construction
• 8 steel teeth

Specifications

• Weight: 18 g

The RetroArms V2 Red Edition complete gearbox has a CNC-machined shell and is equipped with high-quality components, including a Pandora 20:1 gear set and a Jefftron Leviathan V2 MOSFET. A complete solution for a major upgrade of an airsoft electric replica.

Features

• CNC construction
• RetroArms Pandora 20:1 SS gear set (3 mm)
• Jefftron Leviathan V2 MOSFET
• Dean T connector

Specifications

• Weight: 368 g

Package Contents

• RetroArms Pandora 20:1 SS gear set (3 mm)
• RetroArms 8 mm bearings
• RetroArms stainless steel shims
• RetroArms type C cylinder
• RetroArms standard cylinder head
• RetroArms reinforced nylon piston 14.5
• RetroArms nozzle
• RetroArms tappet plate
• RetroArms delayer chip
• RetroArms anti-reversal
• RetroArms A1 piston head
• RetroArms selector plate
• RetroArms type J trigger
• Jefftron Leviathan V2
• Dean T connector

The RetroArms M140 spring is made of SiCr steel and has progressive winding, which ensures smoother gearbox operation. It is intended for tuning AEG airsoft replicas.

Features

• Material: SiCr steel
• Progressive winding

Specifications

• Spring type: M140

The RetroArms CNC piston is made of nylon with 30% glass fiber and is designed for 16T setups. The material is resistant to wear, high temperatures and oils, while keeping a low weight.

Features

• GF30% nylon construction, CNC-machined
• For 16T setups

Specifications

• Weight: 15 g

The RetroArms V2 Green Edition complete gearbox has a CNC-machined shell and is equipped with high-quality components, including a Pandora 13:1 gear set and a Jefftron Leviathan V2 MOSFET. A complete solution for a major upgrade of an airsoft electric replica.

Features

• CNC construction
• RetroArms Pandora 13:1 SS gear set (3 mm)
• Jefftron Leviathan V2 MOSFET
• Dean T connector

Specifications

• Weight: 365 g

Package Contents

• RetroArms Pandora 13:1 SS gear set (3 mm)
• RetroArms 8 mm bearings
• RetroArms stainless steel shims
• RetroArms type C cylinder
• RetroArms standard cylinder head
• RetroArms reinforced nylon piston 14.5
• RetroArms nozzle
• RetroArms tappet plate
• RetroArms delayer chip
• RetroArms anti-reversal
• RetroArms A1 piston head
• RetroArms selector plate
• RetroArms type J trigger
• Jefftron Leviathan V2
• Dean T connector

The 2.5 mm thick RetroArms aluminum AOE plate mounts on the piston head to correct the angle of engagement (AOE) between the piston and the sector gear. It reduces wear on the first tooth of the piston.

Features

• Aluminum construction

Specifications

• Thickness: 2.5 mm

The RetroArms M190 spring is made of SiCr steel and has progressive winding, which ensures smoother gearbox operation. It is intended for tuning AEG airsoft replicas.

Features

• Material: SiCr steel
• Progressive winding

Specifications

• Spring type: M190

The Retroarms stabilizing insert centers and stabilizes the outer barrel inside the handguard. It reduces barrel play and contributes to a more solid and more accurate replica.

Features

• Centers and stabilizes the outer barrel in the handguard

The Retroarms Type B fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in blue.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: blue
• Available in several colors

The RetroArms CNC piston is specially lengthened, reinforced and significantly lightened for DSG builds. It can also be used in standard gearboxes, but it is optimized for RetroArms DSG gearboxes (6394) and has a precise surface on top for the bearings integrated in them.

Compared with the standard piston, it has a longer body and guides with adjusted dimensions, for a reduced leverage effect at a short stroke. The rear section is heavily reinforced to withstand the forces of strong springs in TSG, DSG and SS builds (often around 19 kg), combined with rates of fire of up to 60 BBs per second.

The rack is CNC-milled from quality spring steel, heat-treated: flexible, hard and wear-resistant. It is left without surface treatment (dark gray, possibly with colored spots), for those who prefer to glue it with two-component epoxy adhesive; gluing is not mandatory. Before installation, lubricating the rack is recommended, ideally with silicone grease.

Features

• CNC-milled body made of nylon with 30% glass fiber: resistant to wear, high temperatures and pressure, aggressive oils and breakage
• Lubrication pockets in the contact area with the gearbox
• Reinforced rear section for strong springs and high rates of fire
• CNC-milled, heat-treated spring steel rack
• 8 teeth – suitable only for TSG and DSG 8T gears, for example Pandora (8008 or 8047)
• Can be combined with the extended DSG/TSG spring guide (6678), which prevents the spring from twisting

Specifications

• Configuration: DSG 8T
• Weight: 15.2 g

Enlarging the lightening holes is not recommended, as the structure may be affected. The weight may vary slightly due to moisture absorbed by the material; the piston should not be dried, as moisture significantly increases the strength of the material.

The RetroArms piston head is CNC machined from POM, a lightweight and durable material. It is suited to builds that emphasize low weight and quiet operation.

Features

• Material: POM
• CNC machining

The RetroArms set contains 6 standard 8 mm bushings, CNC-machined from 90MnCrV8 steel. They are designed for the gearboxes of electric airsoft replicas and offer high wear resistance.

Features

• Standard CNC-machined bushings
• 90MnCrV8 steel construction

Specifications

• Diameter: 8 mm

Package Contents

• 6 bushings

The Retroarms stabilizing insert is designed to center and stabilize the outer barrel inside an M-LOK handguard. It reduces barrel play and contributes to a more solid replica.

Features

• Centers and stabilizes the outer barrel
• Designed for M-LOK handguards

The Retroarms Type B fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in yellow.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: yellow
• Available in several colors

The RetroArms CNC piston is specially lengthened, reinforced and significantly lightened for DSG builds. It can also be used in standard gearboxes, but it is optimized for RetroArms DSG gearboxes (6394) and has a precise surface on top for the bearings integrated in them.

Compared with the standard piston, it has a longer body and guides with adjusted dimensions, for a reduced leverage effect at a short stroke. The rear section is heavily reinforced to withstand the forces of strong springs in TSG, DSG and SS builds (often around 19 kg), combined with rates of fire of up to 60 BBs per second.

The rack is CNC-milled from quality spring steel, heat-treated: flexible, hard and wear-resistant. It is left without surface treatment (dark gray, possibly with colored spots), for those who prefer to glue it with two-component epoxy adhesive; gluing is not mandatory. Before installation, lubricating the rack is recommended, ideally with silicone grease.

Features

• CNC-milled body made of nylon with 30% glass fiber: resistant to wear, high temperatures and pressure, aggressive oils and breakage
• Lubrication pockets in the contact area with the gearbox
• Reinforced rear section for strong springs and high rates of fire
• CNC-milled, heat-treated spring steel rack
• 9 teeth – suitable for DSG 8T and 9T gears, for example Pandora (8008 or 8012)
• Can be combined with the extended DSG/TSG spring guide (6678), which prevents the spring from twisting

Specifications

• Configuration: DSG 9T
• Weight: 15.4 g

Enlarging the lightening holes is not recommended, as the structure may be affected. The weight may vary slightly due to moisture absorbed by the material; the piston should not be dried, as moisture significantly increases the strength of the material.

The RetroArms piston head is CNC machined from aluminum, for precise sealing and durability in the gearbox of AEG replicas.

Features

• CNC machined aluminum construction

The Retroarms Type B fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in orange.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: orange
• Available in several colors

The RetroArms CNC piston is made of nylon with 30% glass fiber and is designed for NGRS setups. The material is resistant to wear, high temperatures and oils, while keeping a low weight.

Features

• GF30% nylon construction, CNC-machined
• For NGRS setups

Specifications

• Weight: 15 g

The Retroarms Type B fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in red.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: red
• Available in several colors

The RetroArms CNC piston is specially lengthened, reinforced and significantly lightened for 12-tooth short stroke builds. It is optimized for RetroArms gearboxes, but can also be used in standard gearboxes; before final assembly, check whether the 12T sector gear can fully cock the piston.

Compared with the standard piston, it has a longer body and guides with adjusted dimensions, for a reduced leverage effect at a short stroke. The rear section is heavily reinforced to withstand the forces of strong springs in TSG, DSG and SS builds (often around 19 kg), combined with rates of fire of up to 60 BBs per second.

The rack is CNC-milled from quality spring steel, heat-treated: flexible, hard and wear-resistant. It is left without surface treatment (dark gray, possibly with colored spots), for those who prefer to glue it with two-component epoxy adhesive; gluing is not mandatory. Before installation, lubricating the rack is recommended, ideally with silicone grease.

Features

• CNC-milled body made of nylon with 30% glass fiber: resistant to wear, high temperatures and pressure, aggressive oils and breakage
• Lubrication pockets in the contact area with the gearbox
• Reinforced rear section for strong springs and high rates of fire
• CNC-milled, heat-treated spring steel rack
• 12 teeth – suitable, for example, for Pandora 13:1 SS12T gears (8010)

Specifications

• Configuration: short stroke 12T
• Weight: 15.8 g

Enlarging the lightening holes is not recommended, as the structure may be affected. The weight may vary slightly due to moisture absorbed by the material; the piston should not be dried, as moisture significantly increases the strength of the material.

The RetroArms sector delayer clip mounts on the sector gear in the gearbox of AEG airsoft replicas and helps with correct timing of the firing cycle. It is a small but useful part for gearbox servicing or upgrades.

Features

• Sector delayer clip for the sector gear
• Color: white

The RetroArms CNC piston is specially lengthened, reinforced and significantly lightened for 13-tooth short stroke builds. It is optimized for RetroArms gearboxes, but can also be used in standard gearboxes; before final assembly, check whether the 13T sector gear can fully cock the piston.

Compared with the standard piston, it has a longer body and guides with adjusted dimensions, for a reduced leverage effect at a short stroke. The rear section is heavily reinforced to withstand the forces of strong springs in TSG, DSG and SS builds (often around 19 kg), combined with rates of fire of up to 60 BBs per second.

The rack is CNC-milled from quality spring steel, heat-treated: flexible, hard and wear-resistant. It is left without surface treatment (dark gray, possibly with colored spots), for those who prefer to glue it with two-component epoxy adhesive; gluing is not mandatory. Before installation, lubricating the rack is recommended, ideally with silicone grease.

Features

• CNC-milled body made of nylon with 30% glass fiber: resistant to wear, high temperatures and pressure, aggressive oils and breakage
• Lubrication pockets in the contact area with the gearbox
• Reinforced rear section for strong springs and high rates of fire
• CNC-milled, heat-treated spring steel rack
• 13 teeth – suitable, for example, for Pandora SS13T gears (8055 or 8059)

Specifications

• Configuration: short stroke 13T
• Weight: 16.0 g

Enlarging the lightening holes is not recommended, as the structure may be affected. The weight may vary slightly due to moisture absorbed by the material; the piston should not be dried, as moisture significantly increases the strength of the material.

The Retroarms Type C fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in silver.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: silver
• Available in several colors

The Retroarms Type C fire selector is CNC-machined from anodized EN AW 7075 duralumin and is designed for M4/M16/AR15 series airsoft replicas. It provides precise fire mode selection and a personalized look, in yellow.

Features

• Anodized EN AW 7075 duralumin
• CNC machining
• Compatible with the M4/M16/AR15 series
• Color: yellow
• Available in several colors

The RetroArms nozzle O-ring provides the seal between the nozzle and the cylinder. Replacing a worn seal helps maintain compression and consistent FPS.

The RetroArms CNC end plate replaces the standard end plate between the lower receiver and the buffer tube nut on M4/AR15 replicas, adding two sockets for QD (quick detach) rings on different planes. This way the sling can be attached on either side and at the most comfortable shooting angle, in both single-point and two-point configurations.

Features

• CNC-machined from aluminum alloy, black anodized finish
• Two QD sockets on different planes
• Sling attachable on both sides
• Compatible with M4/AR15 replicas (AEG and GBBR) with a standard buffer tube

Specifications

• Weight: 14 g

Package Contents

• End plate
• The QD ring and the castle nut are not included