GrovTec US G-Comp .308 Muzzle Compensator .308 Caliber 5/8x24 Thread Nitride Black. Specifications for GrovTec US G-Comp .308 Muzzle Compensator: Manufacturer: GrovTec US Color: Black Caliber: 5.56x45mm NATO Finish: Oxide Fabric/Material: Steel Threads per Inch: 5/8x24 Gun Make: Universal Gun Model: Universal Package Contents: GrovTec US G-Comp .308 Muzzle Compensator Crush Washer What firearm models does the manufacturer say GrovTec US G-Comp .308 Muzzle Compensator is compatible with? The manufacturer suggests that GrovTec US G-Comp .308 Muzzle Compensator is compatible with UniversalGrovTec US GTHM316: G-Comp .308 Muzzle Compensator .308 Caliber 5/8x24 Thread Nitride Black