25-30 round mags for the two AR's and the Kel Tec PLR-16 (6 loaded)
30-20 round mags for the G-3 (8 loaded)
10-20 round mags for the FN FAL (6 loaded)
10-30 round, 4-40 round, and 2-75 round drums for the AK and the RPK (6-30 and 1-75 round loaded)
5-30 round mags for the Tantal (2 loaded)
4-22 round for the GSG-5 (1 loaded)
I try to empty the loaded mags every 6 months (at the range if possible) and swap them out with mags that haven't been loaded lately, I just don't trust spring integrity when compressed for long periods of time. I also try to keep at least 200 rounds of 5.56, 7.62 NATO, and 7.62X39 each in bandoleers on strippers.
This is this! It's not something else, it's this!
Don't pull it if you don't plan to use it, and don't use it if you don't plan to kill!