If you were building/buying the most reliable PDW in 9mm, that was Glock mag compatible- what are you running?

Has to be able to run hollow points.
Was going to go down the Aero EPC and Macon barrel but got cold feet and sold my parts off.

Now curious what others would build?
I know Glock mags have their issues with the way the work in an AR platform… I would like LRBHO but would trade that for reliability if needed.

Otherwise I may just go the .300bo route and ditch 9mm pcc

Foxtrot Mike lowers have LRHBO in them. They work great with Glock and Magpul mags.

I have an AR9 builf completly from FTM parts as well, I've only ran Glock and Magpul mags in it, I've never had a problem with either, suppressed or not.

I've heard someone on here disparage the Magpul Glock mags, saying they've heard some negatives on them, but I have been using them since they 1st came out in several Glocks and the Ar9...  GTG...

OEM then Magpul then everything else a distant 3rd. Run steel case in OEM Glock mags for best results.

MagPul mags have the feed angle correct but they also have weak feed lips that will become pliable in hot temperatures. What this means is that fast mag changes will result in spitting rounds out into the magwell and a jam.

ETS mags also have a superior feed angle but they suck in all respects.

Glock OEM are high quality, but the feed angle is less forgiving so you’d better have a high quality lower.

MBX Steelies are awesome but so expensive you’d think they were forged from the bones of a dead god.

I have an EPC9 lower that I SBRed. Works great w/ Glock factory, Magpul & UTG mags. Not one hiccup.

Check out Taccom3G.  He's got a line of "superfeed" barrels that work.  I put together a 4.5" superfeed upper and put it on a PSA glock lower and it fed/cycled perfectly.  I'm pretty sure we just ran ball ammo through it if I'm being completely transparent.  Taccom3g also sells a little feed ramp that fills in that gap between the front of the glock magazine and the barrel.  I used that on another build that I used a Sharps Bros glock lower.  I did fire HPs in that one too.  It worked out well.
What I learned from Tim at Taccom is that many glock lower manufacturers placed the magazine well too far away from the barrel so that when the bolt grabs the next round it ends up nose-diving into the bottom of the barrel breech.
At the time he suggested that JP and JonesArms  (and I think Foxtrot Mike) got it right and moved the magazine well forward a bit.  I ended up buying a JonesArms lower...which was a work of art I might add.  It did not have LRBHO but they were working on an attachment.  They put the magazine catch on the correct side and there was no wobble with the magazine.  I left the Taccom3g ramp on the upper; figured it couldn't hurt anything.  I put several hundred rounds through it and it did not fail to feed once.  Then it sat until I sold it.  That's what I learned...hope it helps.