Shaw Barrels PS90 - 10.4" Threaded Barrel - M12x1 LH

Shaw Barrels PS90 - 10.4" Threaded Barrel - M12x1 LH

Convert your FN PS90 into an authentic factory-length short-barreled rifle (SBR) configuration with the Shaw Custom Barrels PS90 10.4" 5.7x28mm Threaded Barrel. Precision-engineered in the USA by Shaw Barrels, this 10.4-inch replacement barrel allows shooters to replace the lengthy factory 16-inch barrel, restoring the iconic, compact bullpup footprint originally envisioned for the P90/PS90 platform. Chambered in 5.7x28mm with a versatile 1:9" twist rate, it delivers match-grade stability and velocity for a wide range of factory 5.7mm ammunition.

Precision-machined from 4140 Chrome-Moly steel, the barrel features a protective black nitride finish that provides superior corrosion resistance, barrel life, and wear protection inside and out. Weighing just 0.4 pounds, it keeps front-end weight to an absolute minimum while retaining standard FN factory-spec M12x1 LH muzzle threads for seamless attachment of original flash hiders or aftermarket suppressor adapters. (Note: Installing this 10.4" barrel on a factory PS90 creates a Short Barrel Rifle subject to NFA/ATF registration rules.)

Features

Authentic 10.4" SBR Conversion Profile:
Designed specifically for FN PS90 short-barreled rifle conversions, transforming your firearm into a compact, lightweight bullpup platform.

Nitride-Finished 4140 Chrome-Moly Steel:
Machined from durable 4140 Chrome-Moly steel with a full black nitride treatment for maximum heat resistance and barrel wear life.

Factory Spec M12x1 LH Muzzle Threading:
Features standard M12x1 left-hand muzzle threads to accept original P90/PS90 muzzle devices, flash suppressors, or thread adapters.

Optimized 1:9" Twist Rate:
1:9" right-hand twist rate provides exceptional bullet stabilization across both lightweight high-velocity and heavier 5.7x28mm projectiles.

Featherweight 0.4 lb Weight Profile:
Keeps total rifle weight minimal to preserve the PS90's lightning-fast handling and balanced maneuverability.

Specifications