The BLACKHAWK! CQC Shoulder Harness for SERPA Holster Platform was created due to customer demand for a way to use the popular SERPA Retention Holster as a shoulder rig. In response, we have 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.