Daniel Defense AR15 Lite Rail II 12.0 (Rifle) The AR15 Lite Rail is the next generation of Lite Rail from Daniel Defense. The improved design enhances the rails structural integrity, improves functionality, aesthetics and ease of installation to the weapon system without compromising its best-known attributes, one of which being the lightest rail system on the market. Enhanced features include a machined from one piece aluminum rail which replaces our previous two piece welded design, our patented Bolt-Up System, requiring only 4 bolts instead of 6, with tabs that aid in alignment to the upper receiver during installation. Front and Rear Sling Swivel Attachment Points are integrated into both the left and right side rails and are designed to limit the swivels rotation. The AR15 Lite Rail II 12.0 is an extended rail system designed to be used in conjunction with a low profile gas block on either a carbine or mid-length gas system. This rail system gives the end user more real estate to mount various accessories available to the AR15 platform. When mounting a front sight to the top rail, it allows the shooter to have an extended sight radius enabling more precise shot placement. Key Features Light Weight Free Floating Barrel Design Steel Barrel Nut Uninterrupted Upper Rail Platform Integral Sling Swivel Attachment Points with Limited Travel Patented Bolt-Up Mounting System Mil-Spec 1913 Picatinny Rails Grade 8 Military Specification Fasteners Materials & Construction Material: Aircraft Grade 6061-T6 Aluminum Finish: Military Specification Type III Hard Coat Anodized Length: 12.65" Width: 2.06" Weight 13.9 Ounces Inside Diameter: 1.22" Made in the USA! Installation Requirements Bolt-Up System Barrel Nut Wrench (Supplied with Rail) Allen Wrench (Supplied with Rail).