Thankfully I don't live in a state with mag restrictions but if I did I would prefer the shorts. As a matter of fact I would like to be able to pick up a few shorts. To me, a 10 round long mag just seems like a waste of polymer. I also like 20 round mags for my AR. That is not to say that I don't have several long ones but usually don't ever load my AR mags past 20 anyway.