I think it's fair to say this has become my favorite gun in the mod. Extremely useful at short ranges and underrated at longer ones (I have 1-shot killed a reasonable amount of Germans from miles away lately), decent sights and with the added bonus of never being kit limited.
I had a big long post about my tips for the Carbine but on second thought it would likely just be covering what everyone already knows, but I think my favorite thing about it is that the US engineer kit is the perfect one for me. Some of you love specialized kits (sniper, lafette, whatever), but personally, I like to be prepared for whatever any given battle throws at me and the Carbine kit does that the best. With it, I get a knife (obviously), an excellent close-quarters and reasonable long-range gun almost embarrassingly easy to shoot, (to deal with soldiers), Composition B (to deal with tanks), and a wrench, to contribute to my team by repairing shit. Comp B is not great anti-tank weaponry, but it is enough for me that it simply is anti-tank weaponry. I can chase a tank down and do the equivalent of satcheling it, rather than placing mines on the ground and hoping the enemy drives over them. The Composition B also has the additional value of acting like a poor man's grenade, as you can toss into bunkers and houses and whatnot.
So I'd encourage anyone who otherwise dismisses the Carbine to give it another shot.
I have one question though - there's a thread in suggestions about M1 pick up kits and I am wondering if I've found all the (spawnable and pick-up) Carbine kits in the game:
knife/Colt/M1 Carbine/smoke nades/binocs (US SL kit)
knife/M1 Carbine/Comp B/wrench (US engineer kit)
knife/M1A1 Carbine/smoke nades/AP mines/binocs (US scout kit)
shovel/M1 Carbine/Comp B/wrench (US engineer pick-up kit).
Plus the Point du Hoc kit, which I forget exactly what it has.
Are there any others in the game at the time? Pick-up kits with the M1?