They have a whole BUNCH of barrel options now, that they didn't have about a year ago. Before, there were 3 or 4 stainless choices, and 3 or 4 cromoly choices. Now, there's so many listed... The options have definitely grown. When I started building mine a couple years ago, everything was threaded, and if you didn't want a flash suppressor on there, you ran a thread protector on the end. Not so, now - and that's a good thing. Plenty of choices, and the prices are very good. <thumbsup>