Millett Aluminum Cantilever Red Dot Mount features a notched cross bolt for positive lock on Picatinny rail. The aluminum construction stands up to heavy recoil and accommodates scopes with 1" or 30mm tubes. The Red Dot Cantilever Mount is built to hold up and perform during the most intense tactical operation. With mounts from Millett, tactical shooters have the dependability they need for combat scenarios. Always strong and reliable, keeping your sight dead-on and locked in. Trust nothing less than the best for your tactical equipment.