Due to customer demand for a way to use the popular SERPA Retention Holster as a shoulder rig, Blackhawk! has developed this comfortable shoulder harness platform. Made with a tapered web harness that adjusts for size and an offside dual Picatinny Rail Platform for any of our Picatinny Rail System accessories. - Mount your SERPA holster on the underarm platform in a horizontal position - Secure carry and natural drawing motion - Enables one-handed reholstering - Made for medium torsos - SERPA Holster not included- Right Hand