
Availability: In Stock
The Sig Sauer MCX/MPX pistol control brace in coyote brown mounts directly to your MCX, MCX-SPEAR, MCX-SPEAR LT, or MPX platform via the M1913 receiver interface. This factory-engineered folding brace gives you a more stable shooting platform for both bench and tactical work while maintaining the compact profile that makes these rifles so versatile for home defense, patrol, and precision shooting.
Stability matters when you're working at distance or in a tactical sequence, and the included forearm strap transforms your MCX or MPX from a wrist-braced pistol into a shoulder-capable system. The brace folds tight when you don't need it and locks solid when deployed—no wobble, no rattling between configurations. That locking hinge mechanism means you get consistent tool-ups between your range sessions and duty use.
Installation is straightforward: if your MCX or MPX has a 1913 rail interface on the receiver, this brace goes on without gunsmithing. Coyote brown finishes match the modern aesthetic of Sig's modern rifle lines while hiding dust and carbon fouling on the job. Whether you're building a dedicated brace-equipped MCX for close-quarters work or adding one to an existing MPX to unlock its potential, this is the original equipment that lets the platform do what it was designed to do.
| Brand | Sig Sauer |
| Attachment Type | M1913 Picatinny Rail |
| Folding | Yes |
| Locking | Yes |
| Length | Fixed |
| Adjustable Positions | None |
| Color | Coyote Brown |
| Telescoping | No |
| Compatible Platforms | SIG MCX, MCX-SPEAR, MCX-SPEAR LT, SIG MPX |
This brace is designed for the MCX, MCX-SPEAR, MCX-SPEAR LT, and MPX platforms with M1913 receiver interfaces. If your rifle has a standard 1913 Picatinny interface on the receiver, this Sig factory brace will mount directly.
Yes. The brace features a locking hinge mechanism that keeps it rigid when deployed and locked when folded. There is no swinging or movement once the hinge is set, ensuring consistency and reliability between configurations.
The brace comes with a forearm strap that attaches to the main brace structure, providing improved grip and control during shooting applications.
No. This is a fixed-length brace with no telescoping or adjustable positions. Length is optimized for the MCX and MPX receiver platforms as delivered.

SKU: 144598262 • Width: 10.6in • Height: 3.1in • Depth: 11.5in • Weight: 1.28oz





Availability: In Stock
The Sig Sauer MCX/MPX pistol control brace in coyote brown mounts directly to your MCX, MCX-SPEAR, MCX-SPEAR LT, or MPX platform via the M1913 receiver interface. This factory-engineered folding brace gives you a more stable shooting platform for both bench and tactical work while maintaining the compact profile that makes these rifles so versatile for home defense, patrol, and precision shooting.
Stability matters when you're working at distance or in a tactical sequence, and the included forearm strap transforms your MCX or MPX from a wrist-braced pistol into a shoulder-capable system. The brace folds tight when you don't need it and locks solid when deployed—no wobble, no rattling between configurations. That locking hinge mechanism means you get consistent tool-ups between your range sessions and duty use.
Installation is straightforward: if your MCX or MPX has a 1913 rail interface on the receiver, this brace goes on without gunsmithing. Coyote brown finishes match the modern aesthetic of Sig's modern rifle lines while hiding dust and carbon fouling on the job. Whether you're building a dedicated brace-equipped MCX for close-quarters work or adding one to an existing MPX to unlock its potential, this is the original equipment that lets the platform do what it was designed to do.
| Brand | Sig Sauer |
| Attachment Type | M1913 Picatinny Rail |
| Folding | Yes |
| Locking | Yes |
| Length | Fixed |
| Adjustable Positions | None |
| Color | Coyote Brown |
| Telescoping | No |
| Compatible Platforms | SIG MCX, MCX-SPEAR, MCX-SPEAR LT, SIG MPX |
This brace is designed for the MCX, MCX-SPEAR, MCX-SPEAR LT, and MPX platforms with M1913 receiver interfaces. If your rifle has a standard 1913 Picatinny interface on the receiver, this Sig factory brace will mount directly.
Yes. The brace features a locking hinge mechanism that keeps it rigid when deployed and locked when folded. There is no swinging or movement once the hinge is set, ensuring consistency and reliability between configurations.
The brace comes with a forearm strap that attaches to the main brace structure, providing improved grip and control during shooting applications.
No. This is a fixed-length brace with no telescoping or adjustable positions. Length is optimized for the MCX and MPX receiver platforms as delivered.
SKU: 144598262 • Width: 10.6in • Height: 3.1in • Depth: 11.5in • Weight: 1.28oz
