AR Forend Quad Rail 6.75 Inch features 4 Picatinny-style rails for mounting shooting accessories such as flashlights, lasers, scopes and more. This rail is designed to dissipate heat from rifle barrel. It is compatible with AR-15, M16, M4 and other standard military AR carbine platforms. It also features 2 piece free floating AR platform and features 14 sections. Backed by a One Year Limited Warranty.