Vector Optics Rail Install on 21mm picatinny or weaver rail H&K Series Caliber Offset 45 degree side picatinny rails Length: 55mm (522 inch) Height: 17mm from bottom base to top rail (0.7 inch) Weight (net): 48g (1.7 ounce) High quality aluminum alloy in durable black matte finish Shock proof can be used on real fire caliber Fine package with hex key
