We aren't issued anything, but have fairly broad guidelines about what's allowed. We have guys carrying anything from K-frame smiths to HK USP's.
I carry a Glock 19; basically stock with the exception of adding night sights. Loaded with Winchester SXT (the old Black Talon) 127-grain +P+ ammo, and two spare 15-rounders on the belt.
Backup is a KelTec P32 in front off-side pants pocket, in a Galco pocket holster. This allows access to a gun with either hand, and I catch myself often with my left hand in my pocket when dealing with people. It's kind of the "best of both worlds" for everyone involved. I'm not appearing threatening at all to them, as I would if my "gun hand" hovered near my belt gun, so I don't worry the folks, yet there's a gun (albeit an admittedly "lesser" gun) literally in my hand the entire time; they just don't know it, and so aren't made uneasy by it.
I used to carry CorBon JHP's in the .32, but with their short oal, they have a BAD problem with rim-lock, so I now carry it with one corbon in the chamber, and the rest fmj. If you carry a .32 auto, (even though I'm normally a decent fan of corbon), I'd recommend you don't carry their JHP load in the mag. The combination of shorter-than-normal OAL, and the .32's unusual rim, make it WAY too easy to lock up your gun. When loading-unloading the gun each day, all appeared fine, as it only involved the chambered round and the first round up in the magazine, so I had no idea there was a problem with it. I discovered the problem when trying to unload the mag for cleaning; and it had probably been locked up that way for a month. The top round would feed fine, but the second on down were locked up, where the rims had jumped under the round above it. I was effectively carrying a 2-shot .32 auto. That's a scary thing to learn about your "last ditch" gun.
Beyond those, I have the CAR-15 in the car with four mags, and two 31-round Glock 18 magazines. I used to carry a third handgun on duty, but with all the other crap I carry, I scaled back to two.
Let's see... there's the Buck lockblade clipped to my side pocket, a CRKT "Neck Peck", and a B&D 'Executive Edge' knife in my shirt pocket next to my pen. (And the ASP baton, and the radio, and the two pair of cuffs, and the Stinger light, and the notepad, and the cell phone, and the spare cuff keys, and the vest, and the ASP "Stylus" red LED penlight.) I think that's everything; I don't carry pepper spray anymore, as it affects me as bad as anyone it gets used on. [Yeah, call me a wuss.]
Loaded like a pack mule, and nearly as smart...