Aimsports ar low profile front sight is for use with standard height ar-15 rear sights.Features- ball bearing pivot detent, automatically locks into position when raised, flip-up posi-lock design to guarantee zero, quick detachable with adjustable a2 square post, uses standard a2 sight post and same plane handguard/upper receiver height.Type: Flip Up Front/RearFrame Material: AluminumFrame Color: Black AnodizedFirearm Fit: AR-15Style: FoldingFront Material: AluminumRear Material: AluminumFront Color: Black Anodized