A cosmetic fake-suppressor muzzle device for the AR-15 - machined from 6061-T6 aluminum with a 1/2x28 muzzle thread pitch. Threads on like a standard muzzle device and gives the profile of a can without the paperwork, cost, or wait. This is a purely visual accessory; it provides no sound reduction and does not affect gas or recoil. Specs & features: Fits AR-15 barrels with 1/2x28 TPI muzzle threading (.223 Remington / 5.56 NATO) Material: 6061-T6 aluminum Length: 7.09" Outer width: 1.232" Inner bore diameter: 0.36" Weight: 11.7 oz Compatibility: Made for standard 5.56/.223 barrels only - do not install on larger calibers. Cosmetic; not a functional suppressor. A crush washer or peel washers (sold separately) will time the device to the correct clocking. This is not a legal suppressor and cannot be modified to become one.