OWB MRD Double Magazine Holster. Carry your spare mags with you at all times. Extremely comfortable and versatile with a flexible leather spine and belt loops on both sides to accommodate your preferred carry position. Their Double Mag Holster works for both RH OWB Carry and LH OWB Carry. Their MRD Double Magazine Holsters come standard with their proprietary 1.5" Belt Loops.Their 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.