I knew a guy many years ago who lived in a very unstable part of the world. He had made something he called his action belt, and I thought it may be of interest to some.
Essentially it was a thick leather belt on to which he glued a holster, magazine pouches and a torch holder. They were glued in the positions he wanted them so when he slipped it on everything was in the right place straight away. No slipping and sliding!
He kept his sidearm and loaded magazines in the belt, ready to be put on at short notice. When going out in to the bad lands he would clip it over his pants belt using police type sliders.
The system worked well for him, and I thought perhaps would work for others.