DIO wrote:
Not as to argue but if the stock LMGs have such kill chance(46-55% and 100-120 rounds) that means they are superior comared to the stock ARs(50-55% and 30 rounds) and because I think the data you've provided is per bullet(need confirmation tho), so if my assumption is right that would mean LMGs are 300-350% more effective than ARs........

There you have some parts wrong my friend. The stock light machine guns also have average accuracy of around 60% at no recoil while stock assault rifles all have 100% accuracy at no recoil. I provided a link to wiki, but I did not include data that was already on wiki. so the answer is no. plus they have twice reload and you have to fire prone, so the only pro are the extra rounds, range, and faster rate of fire at expense of speed and accuracy.
Yes, it is per bullet.
Please take note that this statistic only takes note of distance with respect to kill chance. other factors such as accuracy, rate of fire, reload etc are not in here