In Rule 2.2 Weapons, after the sentence:

A Soldier may add a weapon to their holster at any time, unless this would result in their holster having three or more weapons, or if the number of copies of a weapon in all Soldiers’ holsters would exceed the availability amount of that weapon.

add the following:

A Soldier may exchange either or both of their weapons for a different available weapon or weapons as a weekly action, unless this would result in the Soldier’s holster having three or more weapons, or if the number of copies of a weapon in all Soldiers’ holsters would exceed the availability amount of that weapon. A Soldier may not exchange weapons while they are a Friendly Combatant in an active skirmish.

It is in the interest of the troops to be able to trade at the local weapon exchange. Each man and woman must be adequately equipped to fight the enemy! With the proper firepower, we will be victorious!