I have a Yankee Hill Machine 6.8 SPC II 16" barrel for sale. It has been rethreaded to accept the common 5/8-24 muzzle device instead of YHM 1/2-36 that it originally came with. It is a carbine length gas system, .750 at the shoulder, diamond fluted and it was sprayed with black air cure cerakote to protect the finish. It does have wear marks on the outside of the barrel and it has had about 300 rounds shot through it. The twist is 1-10 for the barrel. I am asking for $100 shipped. I accept paypal discrete with any fees paid on your end. Feel free to contact me with any questions you might have.