Umarex adapter rail accepts up to eleven mounts. When using the adapter rail rear sight on a pistol will need to be taken off. The aluminum back adapter rail fits onto the following models of airguns: Colt 1911 A1, Walther CP99, Walther CP88 and Beretta M 92 FS.
Specifications and Features:
For the Walther CP88, Walther CP99, Beretta M 92 FS and Colt 1911A1
Accepts 11 mounts
Rear sight of pistol has to be removed