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chrisp51 · February 1, 2019, 06:30 PM

John Thomas (Retro arms) actually opens up the gas hole a bit to help with reliability as part of the build he did on my colt upper.

February 1, 2019, 06:30 PM	#8
chrisp51 Senior Member Join Date: April 25, 2012 Location: NC Posts: 148	John Thomas (Retro arms) actually opens up the gas hole a bit to help with reliability as part of the build he did on my colt upper.