This is a SB Tactical Stabilizing Brace known as the MPX PSB, model MPX-01-SB.
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.
Features:
Dual compatible with SIG MPX and SIG MCX
Complete assembly, ready-to-install with an integral M1913 adjustable housing
Adjustable nylon strap
