PRODUCT FEATURES Vector Optics VOD Footprint That Is Used for SCRD-63 Line Red Dot Sight, Extreme Low Profile, Fit on 21mm 1913 Picatinny and Weaver Mount, Full Metal SPECIFICATIONS Length: 46mm / 1.8in Width: 30mm / 1.2in Overall Height: 13mm / 0.5in Height: 6mm 0.25in Slot Width: 4mm / 0.15in Slot Depth: 3mm / 0.12in Material: 6061-T6 Finish: Black matte Specifically designed for Vector Optics VOD footprint red dot sight Weight: 36g / 1.4oz Precision CNC machined 1913 21mm picatinny and weaver rail