Retro Arms CZ Billet CNC 8mm Ver. 2 Gearbox Shell Grenade this air chamber is mechanically

this air chamber is mechanically sealed off from the supply and the chambers contents is released down the barrel to propel the BB

Ambidextrous Selector Switch

8mm Bushings and Straight Trigger Installed

with hook and loop fastener top closure

Retro Arms CZ Billet CNC 8mm Ver. 2 Gearbox Shell Grenade this air chamber is mechanicallyUnlike most other gearbox shells on the market, the Retro Arms CZ gearbox shells are machined out of a solid block of billet EN AW 7075 T651 aluminum, the same aluminum they use for Boeing commercial aircrafts. Combined with reinforcement of key stress points, the gearbox shell has undergone extensive stress tests and have proven to be resilient without any signs of wear. Quick Change Spring System Anodized Finish Reinforcement in Key Stress Points