10-16-2017, 09:32 PM
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?

