Recommendations for AR 9mm PCC Build
- Thread starter calicojack
- Start date
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Oswaldo87
Active Member
I built mine using QC10 parts (lower, upper, barrel, and bolt). I was concerned reading other folks troubles when piecing together their PCC using parts from different manufacturers. They always seemed to have issues.
Someone might be able to answer if the 9mm Glock mag PCCs have standardized on parts uniformity like an AR-15. I don’t know.
My QC10 has ran flawlessly. Magpul and Glock mags run great. Doesn’t seem to lock back reliably with an empty Magpul mag unless you just fired last round.
Someone might be able to answer if the 9mm Glock mag PCCs have standardized on parts uniformity like an AR-15. I don’t know.
My QC10 has ran flawlessly. Magpul and Glock mags run great. Doesn’t seem to lock back reliably with an empty Magpul mag unless you just fired last round.
Can it be built from scratch, like on this video? The guy claims he used standard lower and upper https://m.youtube.com/watch?v=MrJ4XyiBLj0
Thanks
cstone
Active Member
I will second Quarter Circle 10. All of my Glock lowers are from QC10 and I have two of their .40 S&W BCGs. I have found they run better with heavier than normal buffers. I have one side charging upper, but that is money I regret spending. Ballistic Advantage barrels in .40 S&W and 9mm have worked well and the only place I found a .357 SIG barrel was from QC10. All of my barrels are 16" so that I can run any stock I want. I prefer linear comps over traditional flash hiders at the end of the barrels. Otherwise, they are about as easy to assemble as any other AR and take standard parts. With a red dot, 150 yards minute of torso is routine shooting. 31 round .40 S&W magazines make them pretty useful as well.
I built a pistol with the CMMG RDB barrel/BCG combo they sell. Why are people calling pistols PCCs? Carbines are shortened rifles. Pistols are pistols.
MEAN will ship their mags to MD as they come in a 10 round configuration from the factory. You have to modify them to make them 30 rounders, which is illegal in MD but can be done in a neighbor state with a pair of snips in about 30 seconds. Mine has been flawless and the MEAN mags are pretty resonable in price.
As for the direct blowback and the RDB I could not see much difference as they are both really soft shooting. Double taps may have been slightly tighter with the CMMG set up. Foxtrot Mikes has low cost 9mm uppers that are decent. I have one and it's a good shooter, works with Glock lowers or AR lowers and the MEAN mags for 9mm bolts, MEAN makes two kinds.
MEAN will ship their mags to MD as they come in a 10 round configuration from the factory. You have to modify them to make them 30 rounders, which is illegal in MD but can be done in a neighbor state with a pair of snips in about 30 seconds. Mine has been flawless and the MEAN mags are pretty resonable in price.
As for the direct blowback and the RDB I could not see much difference as they are both really soft shooting. Double taps may have been slightly tighter with the CMMG set up. Foxtrot Mikes has low cost 9mm uppers that are decent. I have one and it's a good shooter, works with Glock lowers or AR lowers and the MEAN mags for 9mm bolts, MEAN makes two kinds.
HonestFool03
Active Member
- Feb 24, 2009
- 786
I was planning to build an ar9, and use the radial delayed blowback system. Ended up getting an absolute steal on an angstadt arms ar9. Kind of regret not getting the cmmg system. Thought about replacing it with the cmmg system but I'd need to replace the barrel and bolt, correct?
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If the Angstadt Arms takes Glock mags, should just be BCG/barrel swap. You’ll most likely want to put in a lighter buffer and maybe spring. The BCG/barrel combo can be found for under $330 if you look around.
davsco
Ultimate Member
i recently 'built' an ar-9 sbr using a zr lower and aero slickside upper. zr also has an 80% option.
https://www.zrtacticalsolutions.com/shop/zr9-billet-9mm-lower-80-pcc/
mine would not work with jp's short stroke bolt and buffer but when i put in their regular bolt and buffer it's been perfect.
strongly recommend just forking over the cash for a jp gmr 13 or 15. jp knows what they're doing. you pay for it, but they run and run.
https://www.zrtacticalsolutions.com/shop/zr9-billet-9mm-lower-80-pcc/
mine would not work with jp's short stroke bolt and buffer but when i put in their regular bolt and buffer it's been perfect.
strongly recommend just forking over the cash for a jp gmr 13 or 15. jp knows what they're doing. you pay for it, but they run and run.
davsco
Ultimate Member
can't believe aero doesn't have their ar-9 stuff out yet!?
I'm definitely just saving up for a jp next year. I've never heard one bad thing about them in years of competition.
The CMMG RDB setup does not always work with random Glock mag lowers, it's somewhat sensitive to magazine height. I'd suggest using the appropriate MEAN Arms mag conversion in a normal lower instead. It's also a lot easier to manage with your normal rifle rig, which is a nice bonus. (Downside is you can't use all those awesome extended Glock mags.)
I have been messing with the Taccom ESSB+DBRS setup, and I'm not quite ready to recommend it yet, but it's an interesting approach to the problem. I might have a better sense for it after another range session. The recoil is much more AR-like (sharper), which has its pluses and minuses, but the sight movement is VERY consistent and minimal. Shockingly so.
I have been messing with the Taccom ESSB+DBRS setup, and I'm not quite ready to recommend it yet, but it's an interesting approach to the problem. I might have a better sense for it after another range session. The recoil is much more AR-like (sharper), which has its pluses and minuses, but the sight movement is VERY consistent and minimal. Shockingly so.
Looking forward to your review of the Taccom systems.
I ended up using a Foxtrot Mike lower receiver and Foxtrot Mike 7" upper. It functions perfectly with FMJ ammo. Not so well with hollow points. I did have to replace the firing pin as I was getting pierced primers (rough edge). Foxtrot Mike sent me a couple extras.
[EDIT] Last round bolt hold open also works perfectly.
This upper: https://www.primaryarms.com/foxtrot...tra-light-complete-upper-pa-exclusive-tri-lug
This lower: https://www.primaryarms.com/foxtrot...e-fm9-premium-9mm-lower-receiver-fm9-lwr-prer
For triggers, either use a standard MILSPEC trigger (group recommended), or if you use a cartridge trigger, you have to use one designed for an AR 9 (supposedly has a different hammer configuration).
That being said; I have read a lot of great things about QC10 and a lot of folks love the CMMG RDB.
They are a hoot to shoot. A lot less blast from a pistol round.
[EDIT] Last round bolt hold open also works perfectly.
This upper: https://www.primaryarms.com/foxtrot...tra-light-complete-upper-pa-exclusive-tri-lug
This lower: https://www.primaryarms.com/foxtrot...e-fm9-premium-9mm-lower-receiver-fm9-lwr-prer
For triggers, either use a standard MILSPEC trigger (group recommended), or if you use a cartridge trigger, you have to use one designed for an AR 9 (supposedly has a different hammer configuration).
That being said; I have read a lot of great things about QC10 and a lot of folks love the CMMG RDB.
They are a hoot to shoot. A lot less blast from a pistol round.
Last edited:
- May 5, 2010
- 6,588
I have heard the same from many people and I am content with just using the CMMG mag conversion kits.
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