Make coop game. In init of units write something like this :
removeAllWeapons this;
removeAllItems this;
removeAllAssignedItems this;
removeUniform this;
removeVest this;
removeBackpack this;
removeHeadgear this;
removeGoggles this;
// THEN add you custom gear except ammo,medpacks,grenades,
this add...... etc

2. Add ammobox with ammo, medpacks,grenades. Start game. Rearm

2 . Play. Sometimes after someones dies or reconnect half or more of alive players instantly lose their inventory and part of gear including all ammo, all meds. everything, someone even loset helmets. Only one mag remains in gun. Last time it happend on my COOP mission in the middle of the firefight. As as result everyone died. Respawn is on. No addition gear scripts were used.

Does anyone have same problem? report please.