The 17” UTG Pro AR15 Keymod Comp Super Slim Float Rail is designed for a standard Mil-spec AR15 upper receiver and has an ergonomic octagonal profile with a grooved surface for a solid, yet comfortable grip, providing you with fast and seamless firearm handling. It is precision machined from 6061-T6 aircraft grade aluminum with a matte black anodized hard-coat finish, which makes it super lightweight. Easily tailoring the rifle to the user’s specific requirements, it features integral anti-rotation tabs for accurate alignment with the upper receiver while completely preventing the handguard from rotating under heavy use. It also features 126 Keymod compatible slots on seven Keymod compatible slot tracks for mounting Keymod compatible rails and direct accessories. It’s designed to fit with standard gas tube and barrel diameter not exceeding 1" and is not compatible with piston system, re-designed or over-sized upper receivers. It has a 42-slot Picatinny top rail that has been scalloped for easy, snag free accessory mounting and is flush fitting and continuous with the flat top AR15 upper receiver. Includes 2 Keymod compatible rail sections, one 4-slot and one 8-slot. Ready for use right out of the box.