Game specs, are game specs. If a sim runs certain rules, then your personal opinions won't matter. For example, filling a high cap with a mid cap amount of BBs still won't be allowed. If it says "no high capacity mag", that means you can't use one with a smaller amount in it, you can't use one to carry spare BBs in, you can't even have one on your person if it's empty.
Most places I've been to do not limit the amount of BBs someone can place in their box mag; they may however, only be allowed to carry one though. LMGs have some disadvantages so it balances out well. Unless of course the opposing weapons are mediocre or worse; but that's the gun owners problem, not the games.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē