Horizontal OWB KYDEX Magazine Holster The Horizontal OWB MRD Magazine Holster allows you to carry your spare mag anywhere along your belt comfortably. Extremely versatile reversible belt clip accommodates your preferred carry position for OWB Carry and Right Hand/Left Hand Draw. The Mag Holster comes fully assembled for RH OWB Carry, but is easily reconfigurable with just a Philips screwdriver. Our Horizontal MRD magazine holster clips adjust to accommodate belts from 1.5" to 1.75". Our MRD Mag Holder is universal for the caliber and round configuration (single stack vs. double stack). Mag Retention is easily adjustable via the Allen Key on the MRD which puts pressure on the flat side of your mag. Horizontal Magazine Holster Selection: 9MM/40SW Single Stack 9MM/.40 Single Stack Magazines (up to 0.65" wide) 9MM/40SW Double Stack 9MM/.40 Double Stack Magazines (up to 0.86" wide) 45ACP Single Stack 45ACP Single Stack Magazines (up to 0.55" wide) 45ACP Double Stack 45ACP Double Stack Magazines (up to 1" wide) 380 Single Stack 380 Single Stack Magazines (up to .58" wide)