The closest factor configuration would be an MT6700, MATCH TARGET HBAR II
I don't have the information at my fingertips, so I'm not sure if it's a 1/7 or 1/9 barrel.
They are not gov't profile barrels, though, they are all HBARs. IIRC, the oldest were actually on slabside, large-hole lowers, and I do not believe that any were released with both the bayo lug and flash hider. Most of the ones you'll find nowadays will be neutered, with neither.
Your best bet at getting an all Colt A4 clone would be to buy a Colt A2 barrel (A4 barrels differ only in the "F" marked FSB, which is not strictly necessary with a rifle length sight radius, and are notoriously hard to find) and graft it on to an MT6700.