SB Tactical MPX Pistol Stabilizing SIG Brace


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SB Tactical MPX Pistol Stabilizing SIG Brace

The MPX PSB is an innovative, 3-position adjustable Pistol Stabilizing Brace dimensioned to fit the SIG SAUER SIG MPX receiver cuts and SIG MCX—ships as a complete assembly, ready-to-install, including an M1913 receiver saddle.

Note Ð This does not fit the SIG MPX Copperhead.


  • 3-position adjustable
  • Dual compatible with SIG MPX and SIG MCX [excluding SIG MPX Copperhead]
  • Complete assembly, ready-to-install, with an integral M1913 adjustable housing

On January 13, 2023, the Attorney General signed ATF final rule 2021R-08F, “Factoring Criteria for Firearms with Attached ‘Stabilizing Braces,’” amending ATF’s regulations to clarify when a rifle is designed, made, and intended to be fired from the shoulder. The final rule was published in the Federal Register on January 31, 2023. Link to Final Rule 2021R-08F

Product Information


SB Tactical



Part Type

Lower Receiver Parts, Stock





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