If I might add my thought on the topic, shoot the gun first. Typically, the M2.0 will shoot around 2" at 25 yards with the right ammo off the bench. IF you find that you can shoot better groups off the bench with other guns, then perhaps you might benefit from a fitted barrel, regardless of whether it is ours, Bar-Sto or any other manufacturer.
Sometimes, in our pursuit of shooting tiny groups we look for an immediate technological patch to fix our woes. I find that it is a small percentage of shooters who can outshoot their stock guns. That being said, when your gun won't put 5 shots on an 18"x 24" target at 50 yards off a bench (like my 1.0) and you can regularly shoot 1"-2" with a custom 1911 or Sig then we can rule out the human element as the culprit for inaccuracy.
My friend Bruce Gray wrote a brilliant piece on accuracy called "Zen and the Art of Hitting Stuff". I really encourage anyone in your position to read it.
Zen and the art of hitting stuff - Grayguns
-Randy