That leads to my only real complaint about the ME2: figuring out which f-ing weapon to equip. You find some cool guns throughout the game but stat screens for them have been replaced by text descriptions. There are no more nice stats to compare against. You have to figure out the weapon characteristics and which fights they're best for from the text or (what most people will probably do) just equip the weapon and figure out how good it is.
The game automatically assigns you the gun with the best specs (IIRC, this doesn't apply to heavy weapons). You can then choose to go with it or swap it for another model of that type of gun.