IWB - I use a lightweight soft leather clip type. I carry it on my strongside, guess in about a 4 o'clock postition. I have to unbuckle my belt to work the gun in, but the thinness of the leather and the slide width of the 3913 makes it comfortable for me to carry all day. For OWB and CCW I carry in Bianchi 105 holster designed for a 1911. The 3913 in the 105 rides a little higher than my 1911 in that holster. For the carry of a spare mag, I use one of several nylon holsters that came with one of the knives or mutli-purpose-tools that I have laying around.
Life Member NRA, VFW.
Vietnam Vet, Hq Trp 1/1 Cav & H Trp 17th Cav., 1967-68.