Sawke Dovetail to Weaver Picatinny Rail Adapter-Tactical Low Profile Airgun/.22 to Picatinny Rail Mount Adapter Mount Adjustor,9 Slot Dovetail to Picatinny rail adaptor for firearms equipped with 11mm or 3/8 inch, flat or rounded, airgunotgun dovetail base. Dovetail rails typically found on air rifles, certain model .22 caliber rimfire rifles,pellet rifle,crossbow. The 20mm picatinny rail allows for stable mounting of scopes,red dots,magnifiers,or other accessories,such as CVLIFE 4X scopeVortex Optics riflescopes. Low profile,adds a bit of length for compact lightweight scopes and more proper eye relief. Rail adaptor installs easily via dovetail mount and one vertical stop pin.