Guntec USA AR-15 Micro Comp Steel Compensator Black. 223 Cal Specifications for Guntec USA AR-15 Micro Comp Steel Compensator: Manufacturer: Guntec USA Projectile Caliber: .223 Caliber Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 Caliber: .223 Remington Condition: New Outer Diameter: 0.875 in Inner Diameter: 0.375 in Weight: 2 oz Length: 1.5 in Fabric/Material: Steel Features of Guntec USA AR-15 Micro Comp Steel Compensator Multi Port Compensator Side Slot Cut Reduces Pressure During Rapid Fire Micro Design Very Compact All Steel Construction 3 Top Porting Holes To Reduce Muzzle Climb Package Contents: Guntec USA AR-15 Micro Comp Steel Compensator What firearm models does the manufacturer say Guntec USA AR-15 Micro Comp Steel Compensator is compatible with? The manufacturer suggests that Guntec USA AR-15 Micro Comp Steel Compensator is compatible with AR-15GUNTEC USA M-COMP: AR-15 Micro Comp Steel CompensatorBlack