Yes, they offered the "C" model which has a compensator rather than a flash suppressor. Unfortunately they are no longer legal for purchase due to the recent change in the assault weapon law. The old law required more than 2 items (detachable mag, pistol grip, flash suppressor, collapsable stock), the new law is more than 1 item. As the PTR has a pistol grip and detachable magazine it's an assault weapon in the Peoples Republic of Connecticut.
"Among the many misdeeds of British rule in India, history will look upon the Act depriving a whole nation of arms as the blackest." - Mohandas Gandhi, an Autobiography, page 446.