CMMG 5.7x28mm PS90 / P90 Threaded 10.4" Barrel - Black Nitride Finish

CMMG 5.7x28mm PS90 / P90 Threaded 10.4" Barrel - Black Nitride Finish

Transform your civilian carbine into its true, intended tactical configuration with the CMMG 10.4″ 5.7x28mm PS90 SBR Barrel. The ultimate upgrade for any FN® PS90® Short Barreled Rifle (SBR) build, this match-grade conversion barrel restores the compact bullpup profile, agile balance, and legendary close-quarters maneuverability of the iconic platform. Engineered specifically to harness the flat-shooting, high-velocity performance of the 5.7x28mm cartridge, it delivers uncompromising duty-grade reliability in an ultra-compact footprint.

Precision-machined from resilient 4140 Chrome Moly steel, this barrel is treated inside and out with a Salt Bath Nitride (SBN) finish for elite thermal dissipation, extended bore life, and superior corrosion resistance. Featuring authentic M12x1.0 LH muzzle threads, it integrates seamlessly with factory-style flash hiders or aftermarket thread adapters for quick suppressor mounting. Backed by CMMG’s renowned manufacturing standards, this 10.4-inch barrel is the definitive choice for finishing your Form 1 project with match-level accuracy and battle-proven durability.

Features

Authentic 10.4″ SBR Dimensions:
Restores the FN PS90 to its compact, military-proven 10.4-inch barrel length, drastically reducing overall weapon length and optimizing balance without sacrificing ballistic velocity.

4140 Chrome Moly Construction:
Machined from ultra-tough 4140CM steel to handle high round counts and rapid strings of fire with sustained dimensional stability.

Salt Bath Nitride (SBN) Finish:
Features an advanced Salt Bath Nitride treatment providing unmatched surface hardness, exceptional wear resistance, and comprehensive defense against environmental corrosion.

Optimized 1:9 Twist Rate:
Engineered with a 1:9 twist to stabilize a wide range of popular 5.7x28mm projectile weights, ensuring consistent sub-MOA precision and devastating terminal performance.

Factory M12x1.0 LH Thread Pitch:
Cut to standard M12x1.0 LH metric muzzle threads for direct compatibility with CMMG PS90 flash hiders, compensators, or 1/2x28 thread adapters for suppressor hosting.

Direct Drop-In Fitment:
Purpose-built as a dedicated replacement barrel for the FN PS90 platform, ensuring smooth cycling, reliable feeding, and straightforward installation for approved SBR conversions.

Specifications