S&W does not sell barrels to the public. Their parts list shows that sales of barrels are "restricted to factory trained armourers" only. However S&W does sell barrels to other gun parts distributors (Brownells, Midway, etc.), who in turn sell the barrels to the public.

Since the Shield is new and in such big demand, S&W is not selling the barrels to anyone, including the distributors.

Bob