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Aircooled6racer

Best Colt 9mm mag PCC lower receiver?

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Hello: I was wondering who makes the best Colt mag lower for a 9mm PCC build. Looking for a good built in magwell and large trigger guard area. Let me know what you guys are using. Planning on building a Colt mag PCC for next year. Thanks, Eric

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I own a PSA dedicated lower for colt mags.  I have been happy with it.  I built a magwell for it, mag changes are fast.  A friend has a cmmg dedicate lower.  It is made from a regular ar forging.  So the magwell is full length.  So the cmmg has a little extra weight from the chunk of aluminum in front of the magwell.  It basically has the same chamfer around the hole.  I made a magwell for him, it reloads just as fast. I would say the cmmg has higher quality anodizing.  I don't believe he had to adjust his ejector, I had to on mine, nothing major.  I am happy with the PSA, the anodizing is good enough for me.  

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I don't really have much to compare it too except an old Colt factory mag block receiver, but I'm very happy with my CMMG Mk9 lower. 

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Hello: Ok here are the makers I have found so far. Gun Point, Black Creek Precision, PSA, QC-10, CMMG, and Rock River Arms. Anyone I am missing? Thanks, Eric

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I'm pretty sure the PSA is re-branded from another manufacturer.  I'm not sure what that manufacturer is.   I know that CMMG parts fit, though.  

I have a blem PSA lower and have been happy with it, but don't know the differences between the various dedicated colt lower brands.

Edited by Bamboo

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I don't think it is available for sale yet but Patriot Ordnance Factory had a video of their new SMG up on FB. It takes Colt mags but appears to have a more generous magwell opening.

I recently went Glock lower, but if I lived in a free state I would try to pick up one of those for sure. I've been disappointed with some small parts sold by POF but I think the receivers are generally well liked. 

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I have a CMMG Colt lower that's been very good. As stated above, it's a standard forging with a Colt size hole in it, leaving plenty of material for the Dremel wizard in all of us. My bolt and barrel are CMMG also, they make good stuff. So do a lot of other outfits, too. Everybody I know has a different brand of PCC, they all work well. 

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Hello: I am narrowing it down to the QC-10, Gun Point and the Black Creek Precision for Colt lowers. All three take a standard bolt release instead of the 9mm one. They also seem to be very similar on how they are machined and setup. Anyone have any of those? Thanks, Eric

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I've got the Gunpoint M9 billet and really like it. In fact I ordered another one today- they've got them on sale right now for $164.

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Hello: I just ordered a QC-10 lower for the Colt mags. I will see how the magwell looks and how fast I can reload it. Little more money than I wanted to spend but as they say "buy once, cry once". It should work well with the uppers I am building. Thanks, Eric

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Hello: Still waiting to hear about the lower from Quarter Circle 10. I sent two emails over the past two days and no reply. They must be very busy over there. Hopefully I will hear something soon. Thinking of maybe going to Nationals and shooting PCC in March if everything works out. Thanks, Eric

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2 hours ago, Aircooled6racer said:

Hello: Still waiting to hear about the lower from Quarter Circle 10. I sent two emails over the past two days and no reply. They must be very busy over there. Hopefully I will hear something soon. Thinking of maybe going to Nationals and shooting PCC in March if everything works out. Thanks, Eric

I ordered on the 28th from QC10 and just received shipping notice today. Also had applied for a dealer account earlier that was just approved as well. I think they had a lot of backlog around the holidays. Good luck with your build. 

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11 hours ago, JHicks8h said:

I ordered on the 28th from QC10 and just received shipping notice today. Also had applied for a dealer account earlier that was just approved as well. I think they had a lot of backlog around the holidays. Good luck with your build. 

Hello: I ordered on the December 27th and nothing yet. Will see. Thanks, Eric

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I want a lower that takes SIG MPX magazines!!!

I'll bet we don't have to wait too soon either.

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Hello: If you need a quick response from Quarter Circle 10 Courtney is the one who gets it done. I should have the lower soon. The build will begin then. A big thank you to Courtney! Thanks, Eric

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8 hours ago, Aircooled6racer said:

Hello: If you need a quick response from Quarter Circle 10 Courtney is the one who gets it done. I should have the lower soon. The build will begin then. A big thank you to Courtney! Thanks, Eric

Thanks Eric!  Every girl likes a compliment, but, we really do work as a team at QC10.  I just happened to be quicker on the draw today.... Cannot wait to see the build!QuarterCircle10-AR15-Colt-Lower-Receiver-Right.jpg

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Pics of the mag well on the QC10 Colt lower?

Edited by Dannybot

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Hello: When I receive the lower next week I will take some pics of it. From what I have seen in pics it has one of the largest magwells for Colt magazines. Thanks, Eric

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5 hours ago, Aircooled6racer said:

Hello: When I receive the lower next week I will take some pics of it. From what I have seen in pics it has one of the largest magwells for Colt magazines. Thanks, Eric

I will do the same for the glock magwell as well. Glad to see all the information sharing. 

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Have a CMMG lower in my build, along with a CMMG lower parts kit, bolt and barrel.  So far the rifle has been flawless function wise. If I could do it over I'd start with a QC10 lower just for the looks.  Otherwise I'm completely happy with the CMMG stuff.

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