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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Aero Precison AR10 issue
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<blockquote data-quote="bamban" data-source="post: 2665543" data-attributes="member: 17722"><p>Agreed. </p><p></p><p>I've chambered over 150 AR barrels from blanks for competition the last couple of years or so, I even have to ask sometime what powder they use. For example AR Comp pressure curve is different from the more common ones..the standard gas port we use tends to have lock back issues. AR Comp needs a slightly larger port. Service rifle legal guns can't have adjustable gas blocks.</p><p></p><p>Someone mentioned about some gas blocks don't need to be against the shoulder. Gas block ports centerline tend to be anywhere from .275 to .300 from the edge. I drill/ream the gas ports .300 from the shoulder and cut a pad with a .125 end mill 180 from the port. Some gas blocks you can align by centering a cut-out when they drill the port to the pad.</p></blockquote><p></p>
[QUOTE="bamban, post: 2665543, member: 17722"] Agreed. I've chambered over 150 AR barrels from blanks for competition the last couple of years or so, I even have to ask sometime what powder they use. For example AR Comp pressure curve is different from the more common ones..the standard gas port we use tends to have lock back issues. AR Comp needs a slightly larger port. Service rifle legal guns can't have adjustable gas blocks. Someone mentioned about some gas blocks don't need to be against the shoulder. Gas block ports centerline tend to be anywhere from .275 to .300 from the edge. I drill/ream the gas ports .300 from the shoulder and cut a pad with a .125 end mill 180 from the port. Some gas blocks you can align by centering a cut-out when they drill the port to the pad. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Aero Precison AR10 issue
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