High Threat Concealment (HTC) collaborated with Troy Industries to make a conceal carry rig for the Troy PDW. If you look closely, the M7A1 stock is attached to a sling that runs under the shirt. The HTC rig holds the AR magazine. The design of the M7A1 stock allows the shooter to release the stock with the firing hand on fire control. With the stock retained by the sling, it is deployed as the shooter draws the PDW down and out of the HTC rig. This would be perfect for executive protection details. They should try making a rig to conceal the PDW with a Magpul 60.