SB Tactical Pistol Stabilizing Brace - Sig MPX MCX Rattler & Rock River LAR-PDS Compatible Includes Folding Hinge Aluminum Strut Black. The FS1913 is a complete assembly offering pull-through opening and a solid lock-up when extended. Specifications for SB Tactical FS1913 Pistol Stabilizing Brace: Manufacturer: SB Tactical Color: Black Max Width: 1.2 in Strap Width: 1 in Included Accessories: Adjustable nylon strap Condition: New Fit: M1913 interface Features of SB Tactical FS1913 Pistol Stabilizing Brace Gun Compatibility: Platforms with M1913 interface at rear of receiver. Complete assembly ready-to-install Advanced steel hinge design locks in both folded and extended positions Pull-through design offering quick deployment Offered with a light-weight polymer or 6061 aluminum strut Comes with adjustable nylon strap for custom fit Veteran designed Package Contents: SB Tactical FS1913 Pistol Stabilizing Brace SB Tactical FS1913A-01-SB: FS1913 Pistol Stabilizing Brace - Sig MPX MCX Rattler & Rock River LAR-PDS Compatible Includes Folding Hinge Aluminum Strut Black