My brother was an FBI agent from about 1975 to 2000. He was issued a M10 2.5" revolver identical to the MSP revolver pictured above. I understand 750 were manufactured; 500 went to the FBI and 250 to the MSP.

Like many LEOs, my brother was a pretty good shot, but not interested in guns per se. When he went to Quantico I made him promise to call me when he was issued his firearm. He called me and I made him read all the markings and measure the barrel. When he finished telling me that he had a S&W model 10 with 2.5" barrel, I said "Impossible. Smith doesn't make that gun." He laughed and said "Well, I'm holding it in my hand." It was issued with a Pachmayr medium sized grip adapter and the factory wooden stocks. He was issued a Bucheimer thumbreak beltslide holster and 2x2 ammo pouch.

I was young and hard headed and I was contemptuous of the FBI M10 at first. I thought they should have given him a 4" Model 19 or 66 with .357 ammo. He was issued the now familiar .38 +P 158 g. LHP from WW and Remington.

Over the years I grew to appreciate his M10 and would love to have it or a copy today. He hung on to his revolver as long as he could until the late '90s when he was forced to turn it in and transition to the Sig P228 9mm. He asked if he could buy the M10 but the bureau said No Way. I imagine it was smelted.