I have an Aero Precision mil-spec lower and am considering buying a Palmetto State Armory 9mm upper (likely something like this: http://palmettostatearmory.com/psa-9...cg-and-ch.html). I already have a Hahn Precision block. There's a disclaimer on the page that says it is designed to work with PSA lowers.
I emailed customer service to verify that it would work and they would not state that it would work with a mil-spec lower. The exact wording was, "We unfortunately cannot make any guarantees that this upper will work with a standard mil-spec lower receiver".
Has anybody have any experience putting this on a mil-spec lower?
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