I normally carry a spare magazine in a nylon knife sheath on my weak side (left). With this method if observed it looks like I have a folding knife in a covered pouch like hundreds of others folks carry.
I am curious as to how anyone thinks that a mag carried in a pocket, even a jeans pocket, can be detected as such?
I've got my Glock 23 on now in the Glock Sport/Combat holster that is OWB. They also make a single OWB mag pouch for it and sometimes I carry that.
Right now I have a double Fobus mag holder on the off-side. I'm going out at about midnight and am wearing a sweatshirt. You may be wondering why I have 44 rounds of .40 S&W on my person. Well, you see, I watched Die Hard again last night.'Nuff said.
Jim