As for pistols, the uncommon ones are either the incredibly overpriced or extremely ugly, or the new ones
TM Desert Eagles aren't too common, as well as Five seveNs, everybody and their dog has a glock or a hicapa though,
A fairly uncommon AEG is an AUG, theres still a number of them, but not nearly as many as armalites, and they are compact considering the 509mm barrel length, downside being they dont have a rail system