The Leapers UTG .22 Airgun to Picatinny Weaver Low Profile Snap-in Adapter is an innovative rail platform to convert most .22 or airgun rails. It is top slot with spring tension retraction and expansion design to snap into Picatinny or Weaver bases. It is extremely low profile and light weight and features precision and repeatable alignment. This adapter also has a removable stop pin for extra secure installation.