When a Squad /Fireteam/Platoon/Company conducts an Assault there is a consolidation period after the assault to re-organise and redistribute ammunition ready to push on.
This includes the ability to Breakdown/recharge magazines or take a belt of 5.56mm SAW ammo and recharge 5.56mm STANAG's and the same with 7.62mm Belts to 7.62mm Magazines? The guy with an AT Weapon, with another rifleman who picked up an AT round from a Dead colleague.
It would be great if Squad Leaders or Fireteam leaders can have the ability to take a Knee and act as central re-distributor of ammunition (such as Grenades or Ammunition) much more quickly. Possibly even a way to nominate a patch of ground for quick pooling of Team ammunition ready for redistribution to depleted SAW gunners / Grenadiers / Riflemen that have been in Heavy contact.
Do not confuse this with resupply, this would be a redistribution function. Also makes the carrying of a 100 round SAW Belt useful for Riflemen to replenish their own STANAGS 4179 Magazines.
I know the weaponry is more modern in ARMA 3 but I have used current technology to illustrate my point.