Silent Industries Black Nub for Alpha Chamber (Hard) Competitive Pistols the MP5 is renowned for

the MP5 is renowned for its accuracy

With this in mind the SR-25 ECC was born

Weight: 85 g | NEQ: 1

Precision CNC machined Upper & Lower receivers with fully licensed Cobalt Kinetics deep engraved trademarks

Silent Industries Black Nub for Alpha Chamber (Hard) Competitive Pistols the MP5 is renowned 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