Silent Industries Black Nub for Alpha Chamber (Hard) Nub Type:Extended Removable stock spacer pads for

Removable stock spacer pads for length-of-pull adjustment

Hybrid gearbox with quick change spring system

Easy to install

1v PEQ pack

Steel Triangle Folding Stock

Silent Industries Black Nub for Alpha Chamber (Hard) Nub Type:Extended Removable stock spacer pads forBlack Nub for the Alpha Series hop up chambers, basically an Omega nub on steroids! Why is it better than the current options? Same width as the hop up window, no side to side wobble Better for heavy weight BBs (0. 36+) Regular and Extended versions available Easier installation, you dont need to center it Gives a bit more hop than ML Omega Precision molded Hard 85A silicone Easy on the bucking, wont puncture it Works well with Stock and Phoenix