This stock adapter is made to turn any airgun with a 1913 rear facing picatinny rail (or adapter) into a takedown carbine/rifle. Installing is as simple as opening the lever, sliding onto the rail, then closing the lever. It can be quickly detached and cased or backpacked. Buck Rail has made adapters for quite a few airguns and have plans for many more. So far, you can attach this to the following airguns with the right adapter: Huben GK1 Umarex Notos Hatsan Velox Crosman 2240, 2300, etc. Crosman 1377, 1322, 2289, etc. Benjamin Marauder Pistol, Crosman 1701, etc. Diana Bandit, Airbug, Chaser, etc. Diana Stormrider, Trailscout, etc. Hatsan Sortie Tact Beeman 2027 and 2028