*New and Improved* Now utilizing anti-rotation screws to insure that the forearm stays solid even under strenuous use. With the addition of the anti-rotation screws our forearms are now even better suited for forward grips and optics. Our Lightweight Forearms come in 5 lengths: Mini, Carbine, Mid-Length, Specter and Rifle. Features include: mounting points for our Swiveling Sling Studs (YHM-9469), Mil. Spec. Picatinny rails, and they accept our Forearm End Caps (YHM-9484A or YHM-9484B sold separately). The barrel nut and forearm tube are made of aircraft quality aluminum and hardcoat anodized to Mil. Specs. The jam nut is made from quality steel and phosphate coated. All assemblies include: one jam nut, one barrel nut, and one forearm tube.