Doublestar-ACE’s Standard Folding Stock Mechanism (FSM) with Boss fits between the rifle’s Receiver Block and the Modular Stock (not included). The FSM can be mounted to fold to either the left or right. It will add .75″ to your Length of Pull and weighs 3.5 oz. The Boss is the raised (oblong shaped) portion on the Arm (small side).
ACE ACE Folding Stock Mechanism with Boss, Fits AK, Folds Left or Right, Black A500-K
