The Midwest Industries K-Series KeyMod handguard is an excellent free float handguard upgrade to your AR-15 that is compatible with any direct-mount accessories that utilize the KeyMod system – one Key Mod 2” rail section is included. It features a slim 1.5” outside diameter for comfort and light weight and 5 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. This assembly is complete with proprietary barrel nut, barrel nut wrench, allen wrenches and tube of lubricant. Lifetime Warranty by Midwest Industries. 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.