At the moment I can't get my upper to fit on properly.If I close it I can see light through most of it, then a portion near the front is where there is too much contact so I can't get the takedown pin to engage. I have a feeling it is the upper (CMMG), I have an LMT on the way and will try that one.
Hey Matt, before you go too much further, pop off your grip and try taking out the tensioning screw, there may just be too much material on the bottom of the CMMG upper. When we were designing the detent system, we tried all the common uppers (ABC's, Oly arms, etc.) Give me a shout if you still have issues and we'll see what we can figure out.
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