The Franklin Armory FSR handguard is offered in multiple sizes (11.5 13 and 15) that features a four picatinny sides on both the front a rear of the handguard. The three sided smooth midsection is both ergonomic and comfortable but also can accept many name brand rail sections for additional accessories. – SPECIFICATIONS: – Free Float & Vented Handguard – Ultra narrow comfortable and easy to grasp midsection – Utilizes Picatinny Rails at front where needed – Full Length Picatinny Rail on Top – Closed Ports Adjacent to Gas Block Location for Safety & Comfort – Two QD Sling Mounts on each side – 6061-T6 Material – Hard Coat Type III Anodized Black – Barrel Nut Included – WEIGHT: FSR 13 Handguard 16.5 oz. – NO SALES TO THE STATES OF NEW YORK DELAWARE and NEW JERSEY