GOHIKING Extended Cantilever Scope Mount Hunting Tactical Scope Rings QR QD Mounts Bases Auto Lock (Color-Three) Designed for mounting 25.4-30 mm scope sights onto flat-top style AR-15 rifles Super Precision Engineered; Riser Mount for Rifles with Picatinny/Weaver Rail High Quality QD Scope Mounting System, Soild Anodized and aluminum construction and precise machining Provides the correct height and forward placement necessary for proper scope mounting on an AR-15