Big Army, back in the day, we just put the Beretta holster on our issue LBE or LBV belt.
After transferring to a SOF unit (as a support guy, not a door kicker) the standard set up was a tactical duty belt set up as a gun belt. Various makes and models were used, I think Eagle was the company my Group actually ordered belts from, but some guys used similar belts from other makers (Tactical Tailor, etc.). Very occasionally you'd see a guy who used an old OD web belt for the same purpose -- while not appropriate for the fashion conscious, they seemed to work just as well.
