M4 AR firing mode innacuracies
The M4's carried by the Army have a semi and 3 round burst firing modes, not full auto. Currently, all US Army soldiers in the ACE mod carry M4's that have semi and full auto firing modes.
Updated by Alderman about 6 years ago
They are not M4's in game, they are M4A1's which are fully auto vs the 3 round burst on the M4's