Ultimtate Arms Gear Aluminum GSG-5 GSG GSG5 German Sport Gun G3 HK H&K Hechler Koch MP5 MP-5 CETME Rifles Low Profile Scope Claw 7/8" Rail Mount Fits most Mil-Spec H&k MP-5, GSG-5, Hk-94, G3, PTR-91 Cetme and similar clones Low profile design. Easy no gunsmith installation. Attaches directly to the existing grooves on the top of rifle/pistol : Perfect to attach your favorite 7/8" based Scope, Sight, Optic, Light, Laser etc. Weighs 2.6 ounces, Length: 5 inches, Rail width: 7/8 inches Precision CNC Machined from Aircraft Grade Aluminum With Black Anodized Finish