Precision machined from Aircraft Aluminum and finished in Matte Black; 45 degree angled offset allows quick access and transition to iron sights when running a larger primary magnified optic; Posi-lock retention detent prevents sight tower from collapsing when in use; Integrated elevation adjustment wheel provides tool-free front sight post adjustment; Utilizes a single locking torx screw with low profile mounting base and square-shaped Iintegral recoil stop for a secure zero hold and return to zero on MIL-STD-1913 Picatinny rails; Designed to Match MT-945, UTG ACCU-SYNC AR15 45 Degree Flip-up Rear Sight