SB TACT SIG MCX/MPX PSTL BRACE 3 POS

Description

The SB Tactical MPX PSB is a purpose-built pistol stabilizing brace designed specifically for the SIG SAUER MPX and MCX platform. Where generic braces attempt broad compatibility, this one is dimensioned to drop directly into the receiver cuts of those two platforms, using an included M1913 receiver saddle that ships as a complete, ready-to-install assembly — no additional hardware or adapter required.

The three-position adjustment lets the shooter dial in length of pull to match arm length, shooting position, or layered clothing without tools. That range spans from a compact 3.875 inches to a full 8.25 inches, giving genuine versatility rather than a token collapsed-versus-extended choice. The collapsible design keeps the overall package tight when maneuverability matters and opens up when a more stable hold is needed for deliberate work.

Fit matters on the MCX side: this brace requires a genuine SIG MCX lower receiver and is not compatible with the SIG MCX Stock Adapter Kit. On the MPX side, some Copperhead configurations are also excluded, so confirming your specific variant before purchase is worth the check. The brace weighs 17 ounces and includes a 1-inch adjustable nylon strap, giving the shooter a second point of contact against the forearm for added stability during use.

SB Tactical originated the pistol stabilizing brace concept, and the MPX PSB reflects the refinements that come from years of designing around a specific platform rather than adapting a general-purpose solution.