My view toward personal equipment is heavily colored by my Vietnam experience. The primary attribute for me was/is the ability to gear up ASAP. Get it on the body, and moving to engagement first; putting all the snaps and buckles right once on the move.
Our likeliest moment of need was usually while asleep. Being able to get out of bivouac and away from the zeroed zone was essential. Arty and rocket bombardment were the initial threat. The most vulnerable moment was while getting up, equipped, and moving. Helmet, flak jacket, boots, rifle, ammo belt, BOOGIE! Get in the hole! (Clothes optional). This was half a century ago (I was back home in '67), but much of it remains accurate.
We figured we had about a minute before the second, corrected barrage arrived. Reality dictated that we actually had more, but erring on the side of speed was the preferred option. Getting skragged while lacing up your boots was a no-no.
These days, these locations; the threat has changed. But the concept still holds water.
I want a belt that has the gear ready to go, and actually gets on the body rapidly.
This is the belt I've chosen. It is complemented by a drop leg holster that I can't find on Amazon, which I got at the DM Base Exchange in Tucson (Blackhawk?). The setup dons quickly; and it provides a total of four pistol mags at the ready, somewhat less cluttered than average. Four may be a lot, may be a little, but I doubt having a couple of extra mags is all that much of a detriment.
These days my handgun and Grabber Carbine both eat 9mm out of the same magazines (Ruger American Pistol 9/Ruger PC Carbine 9). Having the same chambering isn't a real value unless the magazines match. These days my primary applications are for HD and 2-Gun matches; first magazines use 124gr HST, following mags use 124gr Blazer Brass.
The Ruger PC Carbine is a takedown rifle. For carry, it rides in this
Sling Pack.
Greg