"The B-Square Fore End Rail Mount quickly attaches 3 rails to the forward end of an AR-15, M4, or M-16 rifle without removal of modification of the existing forearm. Can attach 2 accessories on the upper forearm and 1 accessory to the bottom rail such as lights, lasers, IR, cameras, bipods, or forward grips. Features a 45 degree offset on the upper rail mounts to allow for clearance for an illumination device such as a flashlight or laser, without interference with the front sight. Provides a comfortable grip on the existing forearm surface as it does not cover the entire forearm. Polymeric design eliminates the sharp points and edges typically found on metallic rail attachments. Injection molded polymer is lightweight and economical, costing a fraction of a metal Picatinny forearm."