Got an AR10 style rifle with a chunky, bloated handrail? We can fix that for you. This 15 inch rail assembly is designed to be lean and clean for a better grip, and will allow you to free-float your own barrel. Kit comes with 3 direct-thread Picatinny mounting blocks that the user can place anywhere on the bottom or side of the handguard to mount your attachments. Package also includes a barrel nut and wrench, as well as timing shims to create needed space. The rail bolts directly to the barrel nut, and all mounting screws are included.