I have the Criterion and it shoots 1/2" with plain old 140 American Gunner. It's a heavy baseball bat of a barrel and appears to be 9oz more than the Wilson. One big selling point for me was the nitride finish. In theory it should last quite a bit longer than plain steel. You will need a good gas block with the 6.5 though. I had to get an Superlative Arms bleed off to control the high pressure...my Odin Works could not tune it down low enough. I would buy the Criterion again...
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