THE 2-MINUTE RULE FOR KNIGHTS ARMAMENT M4 QUAD RAIL

Hand guards will differ based on which you decide to make. The URG-I For example uses a geissele mk16 9″ handguard which only seem to be accessible on their newly introduced URG-I upper receivers.Installation was simple and easy, superb design. Only needed to use a person shim to get it at 11’oclock, exceptional suit and minimal if no hole. Soo