If I could have my way, the k2 would have semi-automatic and full auto instead of burst, that would make it THE weapon to have, no matter what you are going to use it for. when i have the money, I go with the k2/scar for long range and the ump for close range. I prefer the AR in theory because it is more accurate, but in practice, the Ar's are just no good while running, and the c key is too hard to reach, so Assault rifles are spray and pray 80% of the time for me. The smgs are more accurate than the ar's while running, so they are what I use. Best to have an smg at all times and just keep it equipped, because if you need the range of the assault rifle then your not in danger of being killed. Have a good assault rifle like the g 36 for long range or just a sniper.