Primary Weapons Systems FRC Flat Triad Compensator Features The Primary Weapons Systems FRC Flat Triad Compensator is a pin-and-weld muzzle compensator threaded at 1/2x28 and specifically engineered to bring 13.8 barrel configurations to a non-NFA overall length when permanently attached eliminating the need for an NFA short barreled rifle registration on compatible builds. Compatible with calibers from .22 to .375 it covers the full range of centerfire rifle and pistol-caliber carbine platforms commonly threaded at 1/2x28 and its compatibility with the Rearden Atlas and Atlas XL mounting systems makes it a functional suppressor host even in the pin-and-weld configuration. Designed for square shouldered barrels with a recommended torque of 25-35 ft-lbs the Flat Triad provides a precise stable installation that maintains consistent suppressor alignment with compatible Atlas and Atlas XL adapters. The 1/2x28 pin-and-weld compensator and suppressor host measures 2.75 overall adding the precise length needed to bring a 13.8 barrel to a compliant overall rifle length without unnecessary additional protrusion beyond what the pin-and-weld application requires. The flat triad port design redirects flash away from optics and the shooter s line of sight maintaining a clear sight picture during rapid fire while minimizing overpressure felt by the shooter. Primary Weapons Systems engineered the FRC Flat Triad to give AR builders a single muzzle device that solves the NFA compliance challenge and the suppressor host requirement simultaneously without requiring separate devices for each function. Primary Weapons Systems FRC Flat Triad Compensator Specifications Manufacturer: Primary Weapons Systems Model: FRC Flat Triad Compensator Caliber: .223 / .22 to .375 Thread Pitch: 1/2x28 Shoulder: Square Length: 2.75 Mount Compatibility: Rearden Atlas Rearden Atlas XL Application: Pin and Weld for 13.8 Barrels Torque Spec: 25-35 ft-lbs