Thanks for the assistance guys THere are a couple of barrels that I am looking at, but I am currently unsure which to go for. One is manufactured by Inland in 7-43, with a MZ of 1.0. The man is asking for $315 for it. the description says it has a nice bore but has no piston.

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Another is manufactured by Winchester, with no date on it, but has a MZ of 0.5, and is asking for around $180. It also has a nice bore and a piston nut modification.

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Since all of you guys here have a better knowledge of things than I could, I wanted your opinions on this.