Taking inspiration from RMDavis's URGI build I bought a TM MWS M4A1 as a base for my own URGI build (was gonna get a CQBR but couldn't find one in stock). I have a Z-PARTS MARUI Mk16 DD GOV 10.3'' Steel Outer Barrel (MARUI-M4-030), a Z-PARTS MARUI M4 URG-I Airborne Charging Handle (MARUI-M4-028)...