Features:UTG New Gen Super Slim Flip-up Rear Sight for the AR Platform and Other Long Gun Applications Equipped with Picatinny RailPrecision Machined from Aircraft Grade Aluminum with Black AnodizeSpring Loaded Posi-Lock Design with Side Plunger Release for Positive Flipping/Folding; Compress Plunger to Unlock and Fold Down When Not in UseRobust Posi-lock Plunger Coupled with Spring Activated Ball Bearing Guarantees Zero RetentionComplete with Dual Aiming Apertures Ideal for Moving Target Engagements and Limited Visibility or Normal Firing SituationsLow Profile 3mm Locking Bolt and Mounting Deck Securely Attaches to any Picatinny RailDesigned to Match MNT-755 New Gen Super Slim Flip-up Front Sight on Same Level Plane ApplicationsSpecifications:Material: AluminumWeight: 1.59 ozPieces: 1Rail Type: Picatinny/WeaverLength: 1.24" inchWidth: 1.3" inchHeight: 1.87" inch