Retro Arms Airsoft V2 CNC Split Gearbox 8mm with Intergrated Hop Unit Chamber

CNC Split Gearbox V2 with int. Hop Up Chamber (8mm) – QSC

CNC split gearbox V2 designed for M-Series airsoft replicas with V2 gearbox.

This gearbox is manufactured from one solid block of aircraft aluminium (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-aluminium gearboxes. We are manufacturing these gearboxes on our precise CNC milling machines in our factory.

Having a split gearbox has many advantages. For example, much easier installation of the inner parts into the gearbox.

During setups of you cylinder set, there is no need to remove the whole gearbox, only upper part can be dismounted, because it’s only retained by the rear pin. Recommended nozzle length is 21,3mm. Be aware that nozzle length can be influenced by many factors, for example angle of the tappet plate or different length of front part of the Hop Up bucking. In these scenarios, you will need a different nozzle length.

Package includes the CNC Split Gearbox V2 (8mm), Retro Arms CNC Rotary Hop Unit, set of screws and QSC spring guide.

We made some useful improvements into our CNC split gearboxes V2:

Spring holders have grooves, so the springs for tappet plate and main 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 (8,98mm), for non-overturning the bushings during installation.
The socket edges are cutter 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 for better strength.

Both halves of the gearbox shell are cantered 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 a huge radius is.

Added groove for anti-reversal latch spring, so it will not jump off.

Outer edges are now chamfered off.

You can find what type of sockets gearbox have on the outside part of the gearbox 9mm.

Retro Arms gearbox has quick spring change system QSC, where you can remove the spring guide with hex key and change the spring without need of opening the gearbox.

Please be aware due to the QSC system you need to make sure the stock screw is installed before operating the gearbox as this centres the spring guide. Failure to do so could damage your internal parts.

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

This CNC gearbox V2 has protective anodizing, even when it is problematic to anodize aluminium 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).

CNC gearbox can be installed only in airsoft replicas with Tokyo Marui compatible standard. That means even the inner parts. Do not use rude force during installation. Use only 1Nm tightening moment on screws, otherwise the screws will overturn in heads. There is no need of tightening screws with too much force, if you want to be sure that screws will sit perfectly use thread lock.

You can use in our CNC gearbox any spring of your choice but be aware that stronger springs will result in lower durability.

!! do not use MAXX cylinder head !!

Installation of the inner parts and gearbox requires professional knowledge, experience, and skills. There are a lot of airsoft manufacturers on the market and every one of them create their own sizes, there are no standards like engineering ISO in airsoft.

This is the main problem with a lot of inner and outer parts from different manufacturers which can be same product, but with different dimensions.

We recommend using only parts from manufacturers with Tokyo Marui compatible parts, where should not be a problem with compatibility with our CNC gearbox.

Same day dispatch all orders placed before 3pm Monday – Friday

For Airsoft Use Only, cannot be Adapted or Modified for any other purpose

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