Here’s my loadout for the range.

BFG Molle Belt with BFG Inner Belt
Safariland 6004 for Beretta M9 (with multitool)
Eagle FB pouches (Two M4 pouches, One dbl. M9 Mag pouch)
BFG Trauma Kit Now
BFG “BooBoo” Pouch
Pact III Timer
I chose the Molle belt since I wanted an option that was smaller and more streamlined than my previous chest rig. Faster Mag changes, better weight carriage were big factors. As for the Blue Force Gear design, I really like it’s adjustability. The inner belt replaced an Eagle Duty belt, which had problems due to its overlapping velcro section. But the BFG belt is lighter and simpler, just click and go.
As for the holster, the 6004 is an obvious choice, IMHO, its the best thigh mounted holster out there. I’ve used this one for years, and have modified the shroud to ride higher, cutting out one leg strap and shaping the empty slot to conform to the thigh. I also keep an el-cheapo multitool on it for adjusting sights and other tasks requiring small tools.
The Eagle FB pouches are excellent. I’m a big fan of Eagle’s gear, they make nice kit, and their pouches are no exception. They retain the mags so well, I went ahead and trimmed the tops and retainer tabs off the pouches, since they had a rare ability to get stuffed into the pouch along with a retained mag during tac reloads.
The Trauma Kit Now and the BooBoo pouch are two sides of the same coin. The range I go to is fairly out of the way, and has a large quantity of steel targets.(read: accidents waiting to happen) I figured it was definitely better to be safe than sorry, so I got a Trauma Kit Now, which I have setup at the middle of my belt for equal access by each arm. (This is in case the ND/AD/Splashback happens to hit an arm) The BooBoo pouch is for more minor, but much more common things, like severe hammer bite, slide bite, or just for storing misc. items like a lighter or extra hearing protection.
The Timer is probably my favorite piece of kit, since hard numbers are hard to argue with, and it gives you a solid indicator of your skills and progress. Thinking “that was pretty fast” and knowing “my splits were .18 seconds” are two entirely different realms of professionalism.