The MPX PSB is an innovative, 3-position adjustable Pistol Stabilizing Brace dimensioned to fit the receiver cuts of the SIG SAUER SIG MPX and SIG MCX. Ships as a complete assembly, ready-to-install, including an M1913 receiver saddle. Product Features 3-postion adjustable Dual compatible with SIG MPX and SIG MCX Complete assembly, ready-to-install, with an integral M1913 adjustable housing ATF compliant, US veteran designed and proudly made in the USA Product Includes: complete assembly, adjustable nylon strap Product Specifications Fit: SIG MPX/SIG MCX Length: 3.875 in (collapsed), 6 in (mid), 8.25 (extended) in Weight: 19.1 oz Width(Max): 2.25 in Strap Width: 1 in