From everything I've seen, Aber and Eduard barrels are fantastic. There is another brand out there (Canadian, I think, but for the life of me, I can't remember their name) that turn their barrels from brass. Beautiful work, but spendy. I've used a Jordi Rubio (see my sig), and was not particluarly happy with it.
Bill
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DML M4A2 Red Army
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-- There is a fine line between "hobby" and "mental illness". (Author unknown)