Originally Posted by
Circle_10
I've used three of them so far with no issues, and have a fourth waiting to go on a different build. I think as long as everything is in spec it's pretty hard to screw up an upper receiver. At least one of mine seems to have been sourced from Brownells based on the markings on the rear pivot pin.. lug (..?)
One benefit of the Fulton uppers is that they can be had with M4 feedramps as an option, which is nice for those of us using modern M4 profile barrels for 723/727/GUU-5P builds.
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