Battlefield 4 101 - Carbines

TheRussianBadger is back, this time taking us through the pros and cons of Battlefield 4's carbines. Based on Badger's teachings looks like I'll have to give the ACE 21 a bit more of a go. I've barely touched it. I have spent quite a lot of time with its stablemate, the ACE 52 CQB, after looting a silenced model and going on a tear when I ran dry with my primary on Dawnbreaker. Turns out that's the more obstinate of the two Galil short rifles?