GrovTec US G-Comp .223 Muzzle Compensator .223 Caliber 1/2x28 Thread Nitride Black. Specifications for GrovTec US G-Comp Muzzle Compensator: Manufacturer: GrovTec US Color: Black Features of GrovTec US G-Comp Muzzle Compensator Designed To Redirect Propellant Gases And Counter Recoil / Muzzle Rise Machined Steel Package Contents: GrovTec US G-Comp Muzzle Compensator Crush Washer What firearm models does the manufacturer say GrovTec US G-Comp Muzzle Compensator is compatible with? The manufacturer suggests that GrovTec US G-Comp Muzzle Compensator is compatible with UniversalGrovTec US GTHM315: G-Comp .223 Muzzle Compensator .223 Caliber 1/2x28 Thread Nitride Black