The UTG .22 Airgun Picatinny/Weaver Snap-in Adaptor is great for most of your Air rifles and many .22 rifles. The mount is easy to use with the top slot with the spring tension retraction/expansion design to snap into a picatinny/weaver base and easy to take on and off any of your air rifle/.22 rifle needs. Features.22 Airgun Dovetail to Picatinny/Weaver Rail Adaptor Innovative Rail Platform to Convert Most .22/Airgun RailsTop Slot with Spring Tension Retraction/Expansion Design to Snap into Picatinny/Weaver BaseExtremely Low Profile and Lightweight Precision and Repeatable Alignment Easy Installation with Most .22/Airgun Rails, 2PCs/SetRemovable Stop Pin for Extra Secure Installation