Everyone has an opinion on which is "best", what works for me might not work for anyone else. For 95% of the time, my 3913 rides in a Don Hume CopyII. I like it because it snaps around the belt and can be removed without taking off my belt and be attached quickly.
I carry mine in a Cross Breed Super-tuck with great results. I can carry all day long and don't even know I have it on. There are a couple holsters offered by them. Check them out at Crossbreed Holsters > Home
I can't say enough about their products. I also ordered a gun belt from them.
best conceal holster for 3913
I carry mine in a Cross Breed Super-tuck with great results. I can carry all day long and 
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