Was inventorying mags for my varied bang-bangs. Trying to figure what is a good comfy amount to have. 10 factory mags for 2 carbines is low IMO. I do have 9 15rd (feel the love) ProMags. 14 JHP45 factory mags for the carbine and one pistol. I do have 3 14rd ProMags too. I think I am good in the .45 catagory. What's your criteria/guidelines?