Utilizes a standard A2 front sight post with locking post and detent. Can be adjusted with a 556mm bullet tip or A2 front sight adjustment tool (not included). Cross-locking system compatible with all M1913 Picatinny rails. Sight deploys easily; no buttons or levers to fumble with. Returns to folded position by simply depressing button. Places aperture at same height as standard A2 rear. Type III hard coat w/ black oxide finish. Weight: 1.5 oz.