An official Knights Armament M4 Carbine RAS (Rail Adapter System). Originally developed for use on the US military’s M4 and M4A1 Carbine. Highly sought after and perfect for anyone that’s looking to build an M4/M4A1 Carbine clone. It is used but in VERY good condition. It also includes two (2) Knights Armament 11-Rib rail panels. Selling for $205
