Guntec AR-15 Micro Slip Over Barrel Shroud Features The Guntec USA AR-15 Micro Slip Over Barrel Shroud is machined from US made T6 aluminum and finished in a durable anodized black coating that resists wear and corrosion at the muzzle. Its multi port Gatling gun style design vents propellant gas through a series of ports around the shroud redirecting energy that would otherwise drive the muzzle upward and back into the shooter s hands. That porting is rated to cut felt recoil by as much as 70 percent a meaningful reduction that helps keep an AR pistol on target through rapid strings of fire. At just 3.2 ounces and 3 inches in length the shroud adds minimal weight and length to the muzzle end of a lightweight build. Unlike a conventional muzzle device that threads directly onto an exposed barrel this unit slips over the barrel and threads down from the inside covering 1 5/8 inch of barrel while leaving the first 1.25 inch of the shroud unthreaded for a clean transition. It is cut to a 1/2x28 thread pattern with a 0.5 inch inside diameter and a 1.1875 inch outside diameter making it compatible with 5.56 and .223 caliber barrels as well as 9mm barrels sharing the same thread. Because it doubles as both a shroud and a compensator shooters get muzzle protection and recoil control from a single installed part. The Guntec USA AR-15 Micro Slip Over Barrel Shroud is purpose built for AR pistols and is available for sale at GrabAGun. Guntec AR-15 Micro Slip Over Barrel Shroud Specifications Manufacturer: GunTec Model: AR-15 Micro Slip Over Barrel Shroud Material: T6 Aluminum Finish: Anodized Black Thread Pitch: 1/2x28 Inside Diameter: 0.5 Outside Diameter: 1.1875 Length: 3 Barrel Coverage: 1-5/8 Weight: 3.2 oz Recoil Reduction: Up to 70 Percent Caliber: 5.56 Available At: GrabAGun