1/2×28 units are compatible with 5.45 and 5.56mm 24mm AK’s, while 5/8×24 units are 7.62×39 and lesser caliber compatible. It is the buyers responsibility to know the thread pitch of their AK type rifle/pistol.
Index off muzzle face for alignment
Durable melonite QPQ finish
27mm wrench flats
step cut for shims
shims not included but may be utilized to time attached muzzle devices