I've been thinking about getting a gun that can be used in field games and CQB games. I play mostly field, but at cowtown, there is a CQB area and an AK47 doesn't work there. I also plan on going to Vanguard. So, what guns can do this? I know an M4 can, but M4's are more than common. I've been thinking a FAMAS can, since it appears to have the same barrel length as an M4. But, what others are there?