the carbine is a nice weapon to use it has only one flaw its to weak this needs to be fixed so it can stand up to the DMR. I have been useing the carbine for the last day and its all fail vs dmr/br even if you get the 1st 2 shots
The carbine is my main weapon, its ok. It has a much higher RoF and a bigger mag, no need for a buff
I love the carbine and if it was any more powerful it would be overpowered 
I use the Carbine just about all the time. The high firing rate makes up for how weak the shots are. Just spam the trigger and you’ll be fine.