For a period of time, I was training myself to do two gun shooting, and have two double shoulder holster rigs. One is an Alessi Bodyguard for two 1911's, and the other is an Idaho Leather "Last Man Standing" rig, also for 1911's. They both carry the guns extrmently well, and nicely balanced, but the Alessi is more concealable, and thus infinitely more practical. There is no reason why a two gun shoulder rig would not serve well for the person who favors a "New York reload", or someone like a bodyguard, who might find themselves attacked by a greater number of people intent on harming their client, and wanted the added security of a second powerful gun that used the same ammo/magazines as their primary gun, in the event gun #1 jammed, was damaged, or got out of reach during the defense. I have always thought a double rig with two Glock 20's (16 rounds of 10mm each) and 4-6 extra mags would arm a bodyguard about as well as anything someone could throw at him.