Fortis Manufacturing Camber Handguard Features The Fortis Manufacturing Camber Handguard uses the Camber Lock mounting system one of the most solid barrel nut attachment methods on the market built from a purpose machined stainless steel barrel nut and locking camber nuts designed for rigidity and weight savings. Installation only requires a quality castle nut wrench along with the included T30 Torx L-Key letting the rail be locked down or removed for service in minutes. The 1.34 internal diameter clears most gas systems and muzzle devices without interference. A continuous top rail spans the full 9.6 length giving a consistent mounting surface for optics back up irons or offset sights. M-LOK slots are positioned at the standard 3 6 and 9 o clock positions with an additional offset slot near the front for mounting lights and pressure switches without crowding the shooter s support hand. The handguard is machined from aircraft grade 6061-T6 aluminum and finished in Type III hard coat anodizing for corrosion resistance and a durable long wearing exterior. At only 7.08 oz for the handguard and 2.9 oz for the barrel nut the Camber system adds minimal weight to a build while keeping the mounting hardware robust. Made in the USA it is built for shooters who demand a dependable serviceable rail system on their AR-15. Fortis Manufacturing Camber Handguard Specifications Manufacturer: Fortis Manufacturing Model: Camber Handguard Type: Handguard Color: Black Compatible Hosts: AR-15 Material: Aircraft Grade 6061-T6 Aluminum Length: 9.6 Internal Diameter: 1.34 Mount Type: M-LOK Finish: Type III Hard Coat Anodized Barrel Nut: Stainless Steel Castle Nut Wrench Compatible Weight: 7.08 oz (Handguard) 2.9 oz (Barrel Nut) Available At: GrabAGun