Glock (T.Marui, WE) PPQ, 80% Knocker Spring

The 80% knocker spring is used to reduce the pulling force on the knocker in order to increase the knocking force on the magazine valve.  It fits all Glock series GBB pistol (include Glock 17Gen4, 19) of T.Marui and PPQ.  It is specially made for professional shooter and full fill competition needs. All products are made for airsoft only. They are not made for real steel firearms.