Great guide but not quite a "masterclass". The P90 is a "noob gun" because its decent at both close-medium-(dare i say longish) combat, but it is not the best at any of them. Learn your style and base your guns around that, i hardly lose games and i use a sniper rifle half the time =P. Also for perk 3 id recommend steady aim or dead silence running and gunning, you'd be surprised how often you can get the jump without making footstep noises.
besides that i <3 teh comment systemz, keep up the good articles!
besides that i <3 teh comment systemz, keep up the good articles!