One of the best rule for support weapons I'v used in my games is "no burst longer than 2-3 secs".
Both fore realism and safety reasons.
I'm not into penalising people with weight or firing position rules. Since the gun itself is hard to manuver and use.
We used the "1 box mag" rule + loose ammo allowed for reloads. Most reloads of mags where only allowed in ammo dumps and bases, not on the field.
The exception was only for support gunner, wich could reload the boxmags with loose ammo, to simulate changing boxmags.
Vérificateur d'âge: Terrebonne