UTG's precision manufacturing process makes for unmatched quality and compatability. This aluminum AR-15 Carry Handle & Rear sight is designed to fill all real-steel M-16/AR-5 upper receivers and is easily mounted via two large thumb screws. It's lightweight and durable construction allows the user to securely carry their rifle. The rear sight is adjustable for windage and elevation. The adjustment knob clicks into place to prevent unintentional changes while firing due to recoil. This model is also milled with a hole for mounting additional optics mount picatinny/weaver rails on as well.