Flip-up sights deploy with the flick of a finger to provide instant back-up"" so you stay in the fight if your optic or laser sight fails. Super-smooth pivot mechanism with sturdy ball-bearing detent locks positively in the raised position and stays locked until you hit the pushbutton release. Sight folds down neatly out of your sight path when not in use. Machined from high-quality 6061 T6 aluminum and hardcoat anodized for increased wear-resistance. Hex wrench included with all models for easy installation. Front sights are designed to work with Midwest Industries flip-up rear sights"" all models have standard A2 front sight post and clamp directly to Picatinny rails. MCTAR-FFR mounts on AR-15/M16 handguard rail