THE ULTIMATE GUIDE TO KNIGHTS ARMAMENT M4 QUAD RAIL

Hand guards will change dependant upon which you choose to build. The URG-I As an illustration works by using a geissele mk16 nine″ handguard which only seem to be readily available on their newly released URG-I higher receivers.Markings inside the centre leading of the primary or upper handguard are shown above. My particular instance was produc