HK45 (Umares) 150% Recoil Spring

This enhanced recoil spring supplies 150% recoil power to the HK45(Umarex).  While it increases the recoil speed of HK45, it also keeps the loading nozzle perfectly seal up the gasket of the magazine.  The high quality steel piano wire has oustanding durability and reliability. All products are made for airsoft only.  They are not made for real steel firearms.