This one piece free float AR15 platform handguard features a slim 1.5″ outside diameter for comfort and light weight along with 5 anti-rotation QD sling swivel sockets. CNC machined from 6061 aircraft grade aluminum and hard coat anodized to milspec, it is fully dehorned for a smooth, comfortable feel. The high quality MIL-STD 1913 top rail is T-marked for accessory location. “Key Mod” slots on sides & bottom allow for mounting rail segments to attach tactical accessories such as vertical grips, laser sights, flashlights, sling mounts, and bipods. One Key Mod 2″ rail section is included. This assembly is complete with proprietary barrel nut, barrel nut wrench, allen wrenches and tube of lubricant. Some gunsmithing is required (existing barrel nut and front sight base must be removed – a low profile gas block is required – see our part #GB-LOPRO-2U). Made by Midwest Industries in the U.S.A.