I just saying from exprience not calculations.
P90 is more likely around 80-90 dmg but its has even less ap per burst. I tested only clean p90.
If you can't deal around 100 dmg into enemy then your build is just bad
16-19(1/3 # of bullets that can hit at greater than 1 hex)(2/3 (ap ammo mod)(1-.(.40+.15-.35) (.4 from camk2 .15 from toughness/even tougher -.35 from ap ammo))(.95 chance to hit)(40 shots in a burst)
the 16-19 damage is the 13-16 base with +4 from BRD and +3 from MRD then -4 from toughness/tougher and armor DT after ap mod.
This results in a damage range from 108-128 in a realistic scenario where the firer with an avenger has all 3 damage modifiers and the target has combat armor mk 2 with both toughness perks.
Compare this to a xl70e (best sg burst)
23-43(1/3 # of bullets that can hit at greater than 1 hex)(2/3 (ap ammo mod)(1-.(.40+.15-.35) (.4 from camk2 .15 from toughness/even tougher -.35 from ap ammo))(.95 chance to hit)(15 shots in a burst)
which is 58-109 damage range in the EXACT SAME SCENARIO.
Crits are excluded because this is to be considered a non crit build. However the fact that a BG is firing more rounds, the CHANCE of one of its bullets being a crit is 12/40=30% more likely.
SO take the average of the damage ranges
(108+128)/2= 118 damage for a big gun per burst
(58-109)/2= 84 damage a burst per small gun
SO realistically a BG CAN will take 3 bursts to kill an opponent
Small guns on the other hand, will take 4.
again 15 ap for big guns
16 ap for small guns
The damage per ap ratio is 118/6=19.66 for BG and 84/5=16.8 for SG (BRoF and not using -ap weapons)
This is how the numbers fucking work you idiot. So before you speak next time do some math.
*edit* to correct for excluding toughness perks in DR. I realized I left it out on my way to class.
also the correction to the #of bullets in xl70e burst thanks to mojuk