There is nothing about the weapon on back feature in here. I was particularly looking for the code to add one to units in editor (to give LAW and a ruck).
I think the code is
unit SetVariable ["ACE_WeaponOnBack", "weaponname"];
but I haven't confirmed that yet. I will add it once I have checked it or if someone else already knows it works they can? Retsudo
works as long as the space is taken out; I have updated the page.Retsudo