Bronze Supporter
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Saw this video short that shows a 8.5" .308 full auto roller locked with and without suppressor. Huge change in bolt speed with the suppressor. I think you are right flow through is the key cuz this shows what affect a non flow through has on bolt speed.If you picked up one of the many low back pressure 30 cal cans that have hit the market the last couple years you shouldn't have to change anything.