CMMG DEFCAN 9 GEN 2, Suppressor, 9MM, Aluminum, Cerakote Finish, Black, Quick Detach, Includes 9MM Tri Lug Adapter Muzzle Device 99CA47D The DefCan-9 is THE ultimate sub-gun dedicated 9mm suppressor. Rated for full-auto use, the DEFCAN-9 is made from stainless steel and aluminum and coated in a high-temperature Cerakote.