PTR PTR604: PTR 9CT Classic features a plastic classic handguard; accepts original claw mount; black polymer end cap with swivel adapter; paddle style and push button magazine releases; roller-delayed blowback; NFA-registered, full auto sear pack ready; 9-10lb trigger pull; the carrier is nitride treated & tungsten weighted w/full auto bolt carrier. Includes two magazines, single point bungee sling and trigger cable lock.