You could bolt ammo cans or storage boxes to the slide for easy access. If you’re organizing a lot of ammo, grabbing a decent stock is a good idea too. I usually stock up through bulkmunitions.com since they’ve got a solid variety for different calibers. Once you’ve got a good storage system...
I know this thread is a couple of years old, but I thought I'd throw in my two cents in case you're still searching for that ideal horn upgrade, or for anyone else scrolling through older threads with the same question. After a road trip, it really becomes clear what we wish we had in our...