I am doing a custom upper build. I am starting with an ASA side charge upper, Adams Arms piston system. I am also thinking about adding the DOLOS system so I can change out barrels quickly. What I am unsure of is which barrel to get. I have read a lot of comments on the barrels you guys have and am leaning towards the AA 16 inch fluted, but what about the Brownells 18 inch mid weight?
6.5 Grendel build
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