Dovetail to Picatinny/Weaver Adapter Mount Base attaches to 11mm dovetail, top is a Weaver/Picatinny scope rail Compatible with most 9mm - 11mm airgun dovetails rails (flat or rounded, airgun/shotgun dovetail rails) 3.94" long, scalloped Picatinny rail with 0.59" saddle height 0.85" width 9 slots for easy adjustments 3 high strength locking screws ensure a solid mount-to-receiver lock up Precision machined from aircraft grade aluminum with matte black hard coat anodized finish Includes recoil resistant stop pin