Zengi MP5 GSG5 G3 Picatinny Rail Mount, Scope Ring Adapter, 8 Slots Clamps to The Top of The Receiver of MP5/GSG5/G3, Picatinny/Weaver Rail Made from High Quality Aircraft Grade Aluminum Alloy 4 Screws Lock Mount Solidly, 8 Slots High Precision CNC machined. Allen Wrench Included