We carry rifle scope rings for centerfire, rimfire and airguns. Rimfire and airgun rifle scope rings often use an 11mm or 3/8″ rail and the reciever may also include a hole to accept a pin included with the ring to prevent scope ring movement during recoil. 11mm and 3/8″ rings are interchangable.
Weaver and Picatinny rings (sometimes reffered as 22mm) are similar with subtle differences. Rifles will have a bolt on rail that has slots. A crossbolt in the ring will lay in this cross slot to prevent ring movement during recoil. To understand the differences between Weaver (22mm) and Picatinny, read our article <<here>>