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Retro Arms CNC V2 Gearbox Shell 6392

AEG Upgrade Part

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CNC gearbox V2 designed for airsoft replicas AR15 (M4), M16 and other ones with V2 gearbox. This gearbox is manufactured from one solid block of aircraft aluminum (Dural) EN AW 7075 T651, which has higher strength (590MPa), than common construction steel (390MPa). Because of used material, our gearboxes have the best durability and resilience than common zinc-aluminum gearboxes. We are manufacturing these gearboxes on our precise CNC milling machines in our factory. Detail in bracket (8mm) means diameter for bushings/bearings.

Package includes: CNC Gearbox V2 (8mm) – QSC in chosen color, set of screws and QSC spring guide.

We made some useful improvements into our CNC gearboxes V2:

Spring holders have grooves, so the springs for tapped plate and trigger switch will not jump off.
Added groove for safety lever, so it will hold during installation.
Added groove for trigger spring, for better fitting.
AOE control hole.
Sockets for bushings/bearings have smaller diameter about -0,02mm (7,98mm), for non-overturning the bushings during installation. The socket edges are cutted down for better installation.
We enhanced grooves for wiring for 1mm, you can now use wirings with 2,5mm diameter.
Added protecting edge for wiring against the motor.
All threads are now shaped instead of cutted for better strength.
Both of the gearbox parts are centered by milled grooves and edges.
Added hole for releasing anti-reverse latch.
For better durability, we added more material around cylinder head part of the gearbox, this was the most critical part and we added 100% more material where is huge radius.
Added groove for anti-reversal latch spring, so it will not jump off.
Outer edges are now cutted off.
You can find what type of sockets gearbox have on the outside part of the gearbox (8mm or 9mm).

RetroArms gearbox has quick spring change system QSC, where you can put out whole spring guide with hex key and change the spring without need of opening the gearbox. In this solution, you need to secure spring guide with screw, commonly with AR 15 (M4) replicas, it is by stock screw. In situations where you have folding stocks or no stock at all, you have to secure the spring guide with QSC screw. Otherwise there could be situation, where the spring guide will stuck with the spring. This is because the spring guide is not fixed in the gearbox but has will for easy removing with hex key.

Space for trigger switch is designed for compatibility with trigger switches, trigger units from common manufacturers for example: Gate, etc.

CNC gearbox V2 has protective anodizing, even when it is problematic to anodize aluminum EN AW 7075 T651 (Dural), because of its high strength and hardness. If we did not anodize products from this material, there is huge risk of corrosion (huge gray spots with rotten look).

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Manufacturer Retro Arms
SKU retr001
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