720 orong broken

[drownnbait]

II tore the gas o ring on my brand nerw 720. The gas piston was lodged in the barrell assembly and the threads of the mag tube chewed it up.
           
            I have two questions for you guys:
            1. where can I get replacements?
            2 shouldnt the gas piston and o ring stay on the mag tube and not get stuck in the barell assembly?

[CZJedi]

For replacements, first call CZ-USA and see how much they charge. If they give you some outrageous price (like Remington does for thiers), bring it to a hardware supply store, and try to find the replacement there.
           
            The more serious problem is the gas piston in the barrel assembly. That does not sound right to me. Maybe bring it back to your dealer or a gunsmith.

[drownnbait]

CZ sent two orings. Gun has loosened up a bit, works great. Great customer service!