Retro Arms Airsoft CNC M249 / PKM 8mm 7075 Aluminium Gearbox Shell

CNC Gearbox M-249/PKM (8mm) – QSC

CNC gearbox designed for M-249 or PKM airsoft replicas. 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.

Package includes CNC Gearbox M-249/PKM (8mm) –  set of screws.

We made some useful improvements into our CNC M249/PKM gearboxes;

Spring holders have grooves, so the springs for tappet plate will not jump off.

Sockets for bushings/bearings have smaller diameter about -0,02mm (7,98mm), for non-overturning the bushings during installation.

All threads are now shaped instead for better strength.

Both gearbox halves are centred by milled grooves and edges.

Gearbox was re-designed to be lighter but stronger in the most critical parts.

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

Outer edges are now chamfered.

CNC gearbox M249/PKM 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 grey spots with rotten look).

This gearbox is suitable for Classic Army / A&K M-249’s and the A&K PKM.

!! do not use MAXX cylinder head !!

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

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.

Same Day Dispatch on All Orders Placed Before 3pm Monday – Friday

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

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