Leapers spring-loaded low profile flip-up front sight for the ar15 is constructed of aluminum with a anodize black finish with a low profile.Spring-loaded posi-lock push button activation automatically deploys sight tower and prevents sight tower from collapsing when deployed.Uses standard a2 front sight post, interchangeable with other aftermarket posts with equivalent dimensions.Utilizes a single locking torx screw with low profile mounting base.Uses 3mm locking bolt and mounting deck, torx locking plate recommended torque value: 35 in-lbs.Requires sight tool.Front sight post width:0.07", post height: 0.26".Type: Flip Up FrontFrame Material: Aircraft AluminumFrame Color: BlackFirearm Fit: AR-15Base Configuration: Weaver/Picatinny RailStyle: Flip Up Back Up Front SightFirearm Type: AR Platform