Michelle, There are definite differences in how these things are handled, depending on the types of units, location and deployment status. It is important to remember that most military are not regularly armed as part of their duties unless assigned to military police, sentry or guard duty of some type. Even when deployed, the type of deployment (e.g., humanitarian, patrol/presence, humanitarian, etc.) Will dictate armament and weapons conditions.
During my last deployment to Iraq, my unit handled this very poorly. But before I get to that, let me point out that I was treated by the combat stress personnel while in country, twice a week for a full year (deployment was 15 months). Upon reporting to the facility, I was required to surrender all weapons, to include knives. There was a shooting at a combat stress activity in Iraq while I was deployed there.
In my unit, there was a practice of reliving a Marine of their weapon if they exhibited stress symptoms. This was determined to be problematic because it was determined that the process was causing more stress because everyone saw them without their weapons and knew something was wrong. So a process was adopted (unbeknownst to me) that instead of removing the weapon, they would simply confiscate the firing pins from rifles to avoid the stigma of being without their weapon, yet rendering the weapon they carried inoperable.
This became a problem when I sent a Marine out on a convoy, not knowing that his firing pin was sitting in the SgtMaj's desk. The roster for the convoy had been checked by the Marine, his section, his Officer in Charge and the SgtMaj; I approved the final list. This was very routine and it wasn't until the Executive Officer came to me inquiring about the Marine because he had been told I sent the him on a convoy.
In a closed door shouting match... scratch that, meeting - I learned that there were five firing pins in the SgtMaj's desk... I completely flipped out.
In our case, I had no only endangered the Marine, but also, every other member of that convoy operation.
I attacked the policy, because it did nothing to negate the potential for disaster - it only hid it, from everyone. I was outraged that none of the five Marines were being treated at the combat stress facility... how could it be that the Marines were a danger to the point that they had to be disarmed, but not so serious that they required treatment?
Also, due to Quick Reaction drills and requirements, weapons were staged in the working areas with ammunition. So, this Marine's rifle was inoperable, but he or she had 30+ others in arms reach that were perfectly functional...
I finally took the action of sending each Marine to combat stress and ultimately on the advice of the staff there, sent each of those Marines back to the states for treatment.
Local policies and procedures were in place, but were academic... they were CYA procedures, not steps designed to get Marines the help they needed.