This is the Strike Industries M4 Quad Rail Handguard. Strikes patent pending mounting system provides an easy drop-in installation and removal for the end user. Made from aerospace grade aluminum the M4 Quad rail provides lightweight durability in a stylish design. Mil-spec picatinny rails at 3, 6, 9 and 12 o’clock positions provide a multitude of options when attaching accessories like weapon mounted lights, lasers and foregrips.