100% Risk Free, Lifetime Warranty The Monstrum Tactical Dual Rail Picatinny Riser Mount is designed for use with red dots, scopes, or optics, allowing for sight clearance of front sights. The unique dual rail design allows for mounting at a standard 90 degree angle or an offset 45 degrees. Mounting your optic at 45 degrees allows you to retain simultaneous use of the iron sights while adding a secondary sighting system for different shooting conditions. It comes equipped with an easy to operate quick release mechanism that allows for fast and easy attachment and detachment, allowing you to quickly mount or remove your optic depending on need. The mounts attaches via a simple quick release lever rather than with sets screws and allen wrenches like traditional mounts. The bolt mechanism can also be tightened from the other end with a screwdriver, for an even tighter fit. Also available in 5.5 inch (13 Picatinny slots) version for full sized scopes and optics. Includes: 3 Slot Dual Rail 45/90 Degree Picatinny Riser Mount w/ Quick Release Materials: 6061 Aircraft Grade Aluminum Compatibility: AR-15, Rifles with Picatinny rail Weight: 2 oz Length: 1.5 in Height: 0.8 in Color: Black Warranty: Lifetime