Description A low-profile, left side-folding, strut design compatible with all platforms utilizing an M1913 (Picatinny) interface at the rear of the receiver. The FS1913™ is a complete assembly offering pull-through opening and a solid lock-up when extended. FIT: Platforms with M1913 interface at rear of receiver (SIG MPX, SIG MCX, SIG Rattler, Rock River LAR-PDS, RUGER CHARGER, KALASHNIKOV WITH HINGE ADAPTER USA etc.)
