I have a couple of Russian AK74 kits to build. Since they didn't come with barrels, I'd like to use a US barrel if possible. this is so I can keep the original stock set, muzzle brake, and gas piston. My compliance parts would be the receiver, the FCG, a US follower and the barrel. I don't imagine the US barrels are as good as the CHF originals, but are they good? Which if any is the best?