SRS Variable Mass Piston Weight Adjustable Silent Piston Intrinsic alignment with CNC-machined aluminum

Intrinsic alignment with CNC-machined aluminum and steel trunnion and engine chassis (patent pending)

SUS303 stainless steel's corrosion resistance is weakened due to its composition as it's specialized for machinability so the SUS304 steel we use is harder to machine but more durable and has wonderful corrosion resistance

compatible with M24x1 silencers

40 mm Long Air Brake (Optimal for 2J~ Builds or lower)

SRS Variable Mass Piston Weight Adjustable Silent Piston Intrinsic alignment with CNC-machined aluminumSRS Variable Mass Piston NBR piston cup CNC AL 6061 T6 piston head CNC AL 6061 T6 piston body CNC steel piston end CNC aluminium flyweight (4 pieces) CNC steel flyweight (4 pieces) PTFE grease Tools For Pull Bolt Only This special piston will allow you to tweak the muzzle energy of your SRS by adjusting the piston mass from 40 to 137 grams with 15 different configurations.