The FS1913 Pistol Stabilizing Brace was designed to aid users with limited mobility by adding a third point of contact on the forearm for stabilization. The low-profile, left-side folding, strut design is 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. Advanced steel hinge design locks in both folded and extended positions Pull-through design offering quick deployment 6061 aluminum strut Product Includes: complete assembly, adjustable nylon strap Product Specifications Width: 1.2" Length: 9.25" Strap Width: 1.0" Weight: 13.0 oz Color: Black Compatibility: Platforms with an M1913 interface at rear of receiver. Including SIG MPX, MCX, Rattler, Rock River LAR-PDS, and more. Origin: US veteran designed and proudly made in the USA