KVP adapters convert BARREL thread pitches " to" desired MUZZLE device thread pitches. For example, 1/2x28 (barrel thread) to 1/2x36 (muzzle device/suppressor thread), converts a barrel threaded 1/2x28 to 1/2x36 for installation of corresponding muzzle devices or suppressors.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!