to repond to a few of the posts- the guy who mentioned grease guns- my guard unit still had grease guns for the mechanic in the m88 recovery vehicle crew until 2001 when they were traded in for m16A2's. during my brief stint in the USAFR the one time we went to the range we were issed model 15's -this was long after the beretta was adopted.
During my time in both Iraq and Afghanistan we saw all kinds of captured weapons but no S&W's- a bunch of top break enfields were found including one from a guy who shot at us with it- were were in up armored humvees at the time!
a friend was issued in vietnam a model 15 as an intel officer- he claims it was stamped "USAID" for us agency for international development or some such. He relates a story of shooting an escped prisoner 5 times with it to no effect. After that incident he scrounged up an m1911 and m14 to carry.