Dophee 2.17" L 45 Degree Offset Side Mount 20mm Picatinny Weaver Rail for Laser Sights Full metal construction makes this a durable, robust offset rail. 45 degree offset rail allows the attachment of lasers, flashlights, red dot sights. Offset canted design creates more mounting versatility eliminating interference with vertical grips. Perfect for mounting a backup Reflex Sight side by side with your primary optic. Ergonomic design gives easy access to on/off switches for flashlights, lasers, or red dot sights. Total length: 55mm/2.17". Rail: 20mm/0.79".