Mission first tactical's flip-up front back-up sight is constructed of military-grade polymer.It has standard iron sight elevation adjustment, with each click equaling 1/4 moa (standard front sight tool is required).The front sight mounts onto a 1913 picatinny rail.A slim profile allows the sight to sit under most optics.It will accept any standard front post blade.Unlike other backup sights, mft developed a shroud to shelter the front post blade from debris and impact damage when not deployed.It is 2.23" long, 1.08" wide and is.879" high.Rear Color: BlackType: Flip Up RearFrame Material: PolymerFrame Color: BlackFirearm Fit: AR PlatformBase Configuration: Picatinny RailStyle: Flip UpRear Material: PolymerWindage Adjustment: YesElevation Adjustment: 25 MOAFirearm Type: AR Rifle