[Imp]

Actually part of the fun & you need to check as did my WW2 reading some time ago.
I think German troops used smaller chutes & low altitude drops. Because of this unlike the Yanks who dropped with the kitchen sink they just carried SMGs & other weapons were dropped in arms cannisters.

My initial thoughts were to use ammo cannisters & start with empty ammo for all but SMG & grenades. Cant think how you would do this though as if set ammo to zero would not reload.

Easiest option as Lt ketch said turn off all weapons except LMGs & turn on after a number of turns. Or drop ammo cannisters with them & allow turning on other weapons when reach it.

Considered changing to guns so split from weapons but it would not work as considered grouped together for fire at & no smoke.