AR9 pistol upper--seeking recommendations

[BillM]

Have a PSA 7.5" 5.56 pistol. SB brace, Krinkov flash can, red dot sight etc, etc. Fun little gun,
great truck gun.

I want to do a quick and cheap 9mm conversion on it. Keep my lower as-is, push out the pins and
set a 9mm upper on it. I'll try a couple of the Mean Arms EndoMags so I don't have to
deal with magazine adapter blocks.

7.5-8.5" or so, threaded barrel, complete 9mm upper----lots of them out there. Suggestions?

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[B5Ben]

I'd get another PSA. Mine are reliable, just have to wait for them to be in stock and/or on sale.