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Message: <blockquote data-quote="Kopperhed" data-source="post: 3655954" data-attributes="member: 36566"><p>Second that on the gas port......  my first self-assembled Ar10 would not cycle fully on the gas.......  as a single shot it worked perfect. I had the "go-no go" gauges checking the chamber, etc..... thought it was "sticking".......   turns out it was the gas port on the DPMS SASS barrel, the same one they use on their own build...... I even used the DPMS SASS low-pro gas block to "ensure" this would not be a problem.  GunTech checked it out, said the port size was "in spec., but on the small side"....... so they drilled it out, cycles perfectly now.</p></blockquote><p></p>