Due to customer demand for a way to use the popular SERPA Retention Holster as a shoulder rig, we have developed this comfortable shoulder harness platform. Made with a tapered web harness that adjusts for size and an offset dual Picatinny Rail Platform for any of our Picatinny Rail Systems accessories, this allows you to mount your SERPA holster on the underarm platform in a horizontal position. You still get the same secure carry and natural drawing motion with the ease of one-handed re-holstering. Made for both medium and large frame torso individuals. Holster not included.