8.6 blackout 8.5” barrel gas port size

flyfisherman246

flyfisherman246

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May 26, 2017
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#1
Had a customer bring in a Ruger SFAR with an 8.6 blackout barrel. He wants it chopped to 8.5”, threaded, and recontoured for a pistol length gas system. Does anyone have an idea of roughly where to start for gas port size on a barrel like this?
 
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#2
flyfisherman246 said:
Had a customer bring in a Ruger SFAR with an 8.6 blackout barrel. He wants it chopped to 8.5”, threaded, and recontoured for a pistol length gas system. Does anyone have an idea of roughly where to start for gas port size on a barrel like this?
Click to expand...
I built an 8.6 Blackout SBR using an 8" barrel. My gas port size is 0.0995" (see pic).
 

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#4
flyfisherman246 said:
Just what I needed. Thank you!!!
Click to expand...
FWIW, today was the first time I could get it out to the range (awful weather over the last few months; open air range that is subjected to Wx), to put rounds downrange. Shot both supers (210gr) and subs (300gr) with ZERO adjustment to my gas block!!! 😁
 
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