CNC Upper gearbox part V2 designed for airsoft replicas AR15 (M4), M16 made by manufacturer ICS from Taiwan in EBB (Electronic Blow Back) version. 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 - aluminum gearboxes. We are manufacturing these gearboxes on our precise CNC milling machines in our factory.

Package includes: CNC Upper Gearbox ICS AR15 (EBB), set of screws.

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.
All threads are now shaped instead of cut for better strength.
Both of the gearbox parts are centred by milled grooves and edges.
For better durability, we added more material around the cylinder head part of the gearbox, this was the most critical part and we added 100% more material where is huge radius.
Outer edges are now cut off.

CNC upper gearbox ICS AR15 (EBB) 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).

These generally require a level of technical skill to fit properly so we do advise you have it fitted by a competent technician.

Any questions on compatibility, installation or if you would like one of our in house techs to fit the parts for you, please email us on [email protected] or call us on 01293 525880