HEPHAESTUS Stainless Steel Recoil Power Kit for Marui AKM GBB Airsoft

CNC machined stainless steel ( SUS304 ) construction Enhanced Piston Head design for smooth cycling Increase recoiling mass to increase kick and felt recoil ( HE-TM-004 : ~68g vs stock AKM Dummy Gas Piston : ~25g ) Improved weight balancing for better shooting experience while keeping the rate of fire and gas efficiency Drop-in upgrade to replace stock dummy gas piston of Tokyo Marui AKM GBBR ( #MGG9-107 )