GuardianE said:FMJ? Not as far as I'm concerned. And I've gotten a fair amount of kills through walls. It's not worth giving up a Red Dot for, anyway. Red dot adds some much needed long range accuracy to the gun.
Like I said, I tried out the FAL, got used to it, racked up some nice kills/upgrades, and just recently went back. The FAL has brutal recoil by comparison. The FAMAS is very accurate, but so weak... even with Stopping Power. Once I made the switch from FAMAS to SCAR, I never went back. I could take down people with the SCAR in half the time. I only tried out the TAR a little bit, but its range left much to be desired. The M-16 is allegedly the best rifle in the game, but I've heard mixed things. I haven't unlocked it yet.
Just for the record, Red Dot doesn't really add accuracy or range. It's just perceived, because you think you aim better with a red dot. (I think you knew that, but I just want new players to understand that any type of sight isn't actually improving your gun). I loved the Red Dot, until I realized the power of some of the other attachments, and then forced myself to start using my SCAR without it. Not only does it cripple most people that try picking up my gun (if I die), but since I'm now less reliant on always having that Red Dot, I'm better with most guns I pick up over all, and I can load out many different attachments WITHOUT having bling. IMO, Bling is a HUGE waste of a perk if you're using a sight. Sleight of Hand is much better than Bling.
I'm about to get the ACR, and I'm excited. I usually use the SCAR, though the M4 handles almost exactly the same, so I occasionally use that for a change of pace. From my experience of the ACR in single player, and picking it up every so often in Multiplayer, it's going to be a SCAR + 1.