The Houge AR15 M16 Carbine Free Float Forend with Grey Gripping is constructed with 6061-T6 aluminum and is anodized according to military specifications. Free floating the forend tube enhances the accuracy of the rifle by keeping the stress off the barrel. Most models have a non-slip OverMolded rubber gripping area that insulates your hand from the heat and shock generated by rapid fire. Hogue's forends are perfect comfortable alternatives to bulky quad-rail systems.