Carbine length, two-piece vented forearm snaps solidly in place and replaces factory plastic handguard with no gunsmithing, no permanent alterations to rifle. Each of the four MIL-STD 1913 Picatinny rails contains 15 mounting slots for optics, lasers, vertical grips, bipods, and lights. Two-piece design permits removal of lower section to install a grenade launcher or shotgun. Both pieces remove easily for cleaning and maintenance. Rails are laser etched with white alphanumeric position markings to aid in fast mounting and remounting of optics and accessories.