Non many, for sure...not ANY, likely. However, one would think that the same would be true for most any military base, yet if you drive on virtually all of them, you will see a sign that says “NO WEAPONS ALLOWED” or similar.
The poster's challenge was that murder rates in prison must be much lower than on the outside because nobody has a gun or other weapon.
Turns out the US murder rate is about 4.5 people per 100,000 per year. The murder rate in jail is upwards of 47.0 people per 100,000 per year!
Where nobody has a weapon and where they are intensely guarded and restricted the murder rate is OVER TEN TIMES what it is under conditions of freedom where 270,000,000 people wander about with firearms, and 320,000,000 have easy access to sharp objects, knives, frirbrands, poison, high cliffs and buildings (to push people off of) and so on.
Jail is not as safe as real life.
That does puzzle me. We spend billions training soldiers and marines to become experts with firearms. We train them to be disciplined and hone their skills especially in stressful circumstances or in a crisis situation. Then we don't trust them to have guns on a military base amongst their fellow expertly trained brethren. Really?
In Israel (as I understand it), active duty soldiers (which every citizen is required to be at some point) are required to keep their firearm with them at all times. They have to seek special permisson to be anywhere with out it regardless of whether they are "on duty" or not. (Again, as I understand it).