Originally Posted by
PatrioticDisorder
10.3” DD barrels going back at least a year and a half are 0.070-0.072 and to be honest, they may be a bit on the undergassed side. I run 2 with VLTOR A5H1 & green sprinco spring. The standard A5H2 with sprinco spring is a bit too heavy for weaker .223 like PMC bronze (and even my HD ammo, federal fusion MSR) and forget about the A5H3 or H4. I say get whatever barrel you want, if you shoot suppressed you are going to get gas in your face, it’s really hard to get around that unfortunately.
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