Midwest Industries Muzzle Device Collar SIG MPX 9mm - Phosphate

The Midwest Industries Muzzle Device Collar is a precision barrel adapter engineered specifically for SIG MPX 9mm carbines and pistols. The SIG MPX ships from the factory with a tapered barrel shoulder that prevents the proper seating of most aftermarket muzzle devices. This collar solves that issue by converting the factory profile to a true 90-degree shoulder, providing the correct mounting interface for standard thread-on compensators, brakes, and blast diverters.

Machined from rugged 4140 steel and finished with a corrosion-resistant phosphate coating, this collar is built to withstand the heat and pressure of regular 9mm fire while maintaining concentric alignment. As a Made in USA Midwest Industries component, it is engineered to the same standards as the company's well-known handguard and optic-mount lines for the SIG MPX platform.

Installation is straightforward: the collar threads onto the SIG MPX 9mm barrel shoulder, and your chosen muzzle device then threads onto the collar, indexing against the new 90-degree shoulder for a solid, repeatable fit. Whether you are upgrading a factory MPX carbine or building a custom 9mm SBR or pistol, this adapter delivers the proper shoulder geometry needed to securely mount your preferred muzzle hardware.