Bring new life to a firearm that may not sport a common muzzle thread. KVP thread adapters are the best choice for converting your current barrel thread to a standard thread. Allow yourself the flexibility to attach your favorite muzzle device/suppressor, to multiple weapon platforms! KVP adapters convert BARREL thread pitches to desired MUZZLE device thread pitches. For example, 1/2 28 (barrel thread) to 1/2 36 (muzzle device/suppressor thread), converts a barrel threaded 1/2 28 to 1/2 36 for installation of corresponding muzzle devices or suppressors. Product Specifications Length: 1.35" OD: 0.84" OD Thread Length: .600"