Insurgency is a pretty good game on PC. Only $15 and its worth it though the graphics are a little simple. It has a bit more realism/tactical element than battlefield/COD and usually only takes 1 or 2 shots to take an enemy down. Features an MP5K and a UMP45. Interestingly unlike most other shooters you can select fire mode (MP5K has a 3 round burst and the UMP a 2 round burst).