I looked for something that would hold multiple calibers that i generally use at the range and found none So i decided to try to create one. This is the first one I created. Hope you all enjoy it! i know i found it really handy. The 9mm side is double stacked to hold up to 364 rds and the .223 will hold 165 rds. Everything fits in a Milwaukee Packout model 48-22-8435.