from what ive seen its like any other highcap, i used to be an ammo mule for one of the saw gunners on my team, he just hit the button after every few bursts, rather than winding manually you just hit the button for it to wind for you
alternatively i believe there are mags u can get that actually detect the vibrations and sound made by your mechbox cycling, so as you are firing its constantly winding and feeding more ammo in, not sure how well they work tho
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