The APC9-SD SMG combines the reliability, accuracy and ambidextrous operation of the APC9 SMG with the advantages of an integral suppressor. (sold separately). Thanks to special ports in front of the chamber, supersonic ammunition can be used. These cartridges will be reduced to subsonic speed by the ports. Stock sold with pistol but detached. Attaching stock constitutes manufacturing an SBR. Buyer assumes all responsibility.