I have put together two rifles using a PSA lower. They were matched with an LMT upper and a BCM upper and both were a nice tight fit. I have heard of people having issues with the pin holes being undersized but i have not had that issue, mine were good to go and wouldnt hesitate to use another.
"If you love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that you were our countrymen"
-Samuel Adams, 1776
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