I was in the regular USAF in the early 1970s. I was a nuclear weapons specialist. Anytime we were moving special weapons outside, we had to be armed...this was generally a Model 10 or a Model 15 with a 4 inch barrel.
But, one pistol I remember real well, that I never got to shoot, was a snub-nose, K-frame, square-butt model...neat looking little pistols. Being the weapons storage area, many small arms were stored there when not needed by the security police (sky cops) and the aircrewmen. There were a number of these snubbies, some were round butt, and some were square butt.
I know the USAF had some aluminum frame S&W's, but I don't think our base had any. All we had was choppers anyway.
457 here. Rotorheads forever