The Blackhawk Short Rail Panel is engineered to protect your unused rail sections from damage and give you an excellent positive gripping surface. These panels are made of tough, rigid polymer and use the BLACKHAWK! Rail-Lok integral locking mechanism to keep them securely in place. With this rail panel, you can ensure protection from weapon heat and sharp rail edges. These low-profile rail panels improve the look, feel and control of your firearm. The long rail panels are perfect for providing full coverage on an AR-15/M4 Carbine length forend rail. This model fits most AR-15/M4 Picatinny Rails Designs and comes in Olive Drab, OD Green.