Think about the magazine holders before you buy
I was at a Zombie competition over the weekend and I have to say that this was by far the most professionally run competitions and some of the best tactical gear and firearms I have ever seen on a firing range. There were several shotgun courses which meant there were plenty of people showing up with shotguns and gear, part of the fun of the competition is that every that competed in this everyone that was there had to lug the gear that used with them at all times. Even though you still have to see a lot of Made in China on the gear, the designs of holsters and magazine holders has improved.
There were a few tactical vests that I got to see that were specifically designed for shotguns. I’m doing a little research on what kind of vests these were, but it was impressive. Uncle Mikes and Fobus make kydex magazine holders which work very well for IDPA or competitive shooting, but they are not the most vesatile for real hard use. Eventually these holders will get a little loose with hard usesage and you will hear a rattle when moving fast. Carrying magazines that have straps on them are not the best for competition or CCW because I personally think it’s one more thing to have to flip out of the way. For combat these work fine and for some competitions they work, but I strongly recommend the use of the Blackhawk single and double stack holders.