Ultimate Arms Gear Tactical Aluminum Detachable Low Profile Front A2 Square Post Sight Weaver Picatinny Top Flattop Mount Rail Base Black Finish Aluminum Construction Easy To Install - Great For Flattop Rifles, Shotguns, Airsoft Or Even Paintball With Weavery Picatinny (7/8") Top Rails Low Profile - Height Approximately 1.5" Secure Locking Plate Complete Front A2 Square Post Assembly