Hey all -
Just sharing this in case it might help anyone. A few weeks ago my brother found a pretty neat way to carry a spare magazine while conceal carrying - the Snagmag. Works pretty well. If you carry concealed and never found a great way to carry a spare magazine except loose in a pocket, give this a look see.
Here's the link to their site: http://www.snagmag.com/snagmag-concealed-magazine-holster/
I am in no way connected or related to this company or product. Just sharing because it is pretty sweet and I thought it might help someone out.