Sniper rifles: UBER HIGH accuracy, Damage HIGH, Reload time Slow, Chamber time SLOW, Better zoom when ADS
ARs: Damage higher at longer range less damage in CQC, Accuracy decent
LMGs: LOTS OF AMMO. Low dammage,low accuracy, HIGH FIRE RATE +50 health (100 rounds or more in one mag)
Demolitions: Rocket launcher, land mines, extra nades, and a pistol. (At least 4 rockets)
And special pickups you have to dig for: high damage rounds for 60 seconds, ammo, health, high explosive rockets/nades
That is all :P