Rick H-
By General Order, everyone at that time was required to carry the prescribed weapon which was a 4 inch 38 Special revolver. No matter what. We didn't place to much faith in the 38 so we all carried something else as a "secondary weapon". Most carried a 1911 or a BHP. But no matter what you had to carry that 38 revolver hence the green colored bullet. No one cared about that gun, the only gun we really cared about was our BUG.