SB Tactical MPX: Three-Position Brace Contoured to SIG Receiver Cuts
Features
- 3-position adjustable length (3.875″, 6.0″, 8.25″)
- Dimensioned specifically to fit SIG MPX and MCX receiver cuts
- Integral M1913 adjustable housing
- Adjustable nylon strap
- Complete assembly ready to install
- US veteran designed
The SB Tactical MPX solves the fit and adjustability problem by contouring specifically to SIG MPX and MCX receiver geometry with three distinct length positions. This brace works well for shooters needing proper length of pull adjustment across different shooting positions, builds where compact storage and full extension both matter, and anyone wanting a purpose-built SIG solution. The integral M1913 housing and receiver-specific dimensions provide solid lockup without adapters or shims, while three adjustment positions accommodate everything from close-quarters work to extended shooting stances.
Note: Not compatible with SIG MPX Copperhead models or SIG MCX Stock Adapter Kit. Requires genuine SIG MCX lower receiver for MCX compatibility.
Specifications
- Brand: SB Tactical
- Model: MPX PSB
- MPN: MPX-01-SB
- Platform: SIG MPX/SIG MCX
- Adjustment Positions: 3
- Length Positions: 3.875″, 6.0″, 8.25″
- Width: 2.25″ (maximum)
- Strap Width: 1.0″
- Weight: 19.1 oz
- Mounting: Integral M1913 Adjustable Housing
- Color: Black
- Made in: USA
What’s Included
- 1x MPX stabilizing brace (complete assembly)
- 1x Adjustable nylon strap
- 1x M1913 receiver saddle












