We switched to S&W 645's in the 80's.About 8 years ago we were given the option of using the BDU style uniform. The honestly have been great. I carry about 20 pounds of gear when I get out of the car, most is the vest and gun belt but there are several other things that I carry now that I couldn't have with the class A uniform. There are pockets all over them. Plus, working second and third shift it's loose enough going over fences. Easier to clean also. The big thing is we pay for them ourselves. Yes we get a uniform allowance and have to maintain 1 class A uniform. As far as the pistols, we started to transition to semi automatic pistols way before 9-11. I hope that clears things up a little.
We used the class A uniform for everyday Duty use until after I retired.