DoubleStar's DS-420 Handguard's 12-inch oval design is created using aircraft-grade 60-61 T6 aluminum, providing room to add accessories and the ablility to grip 20-inch barreled AR rifles. The four-sided Picatinny rail is a mil-spec system. This universal system enables users to mount a variety of tactical accessories to the forearm of the rifle. The snap-on installation has a spring pressure that forces the handguard against the front handguard cap.