9mm AR: CMMG or RRA?

annihilation-time · Oct 23, 2011

I'm thinking about a 9mm AR, but I'm not sure whether I should go with a RRA or CMMG. The only thing I do know is I plan on the lower being integral. Please help me out and give me your opinions. CMMG or RRA?

teratos · Oct 23, 2011

Neither. Go with the Double Diamond lower. It may be a bit more expensive, but I think it's cool. They have a lower which takes Glock mags in the works.

Forest · Oct 23, 2011

teratos said:
Neither. Go with the Double Diamond lower. It may be a bit more expensive, but I think it's cool. They have a lower which takes Glock mags in the works.

Hmm, if they come out with a Glock version I just might get around to building a 9mm SBR.

annihilation-time · Oct 23, 2011

Any other advice guys. I'd like to here from some more 9mm AR owners. I'm looking to build a reliable firearm, so feel free to speak your minds.

Ooops · Oct 23, 2011

Get the CMMG. It runs like a champ. I've run the crappiest ammo through it and have never had an issue.

annihilation-time · Oct 23, 2011

Ooops said:
Get the CMMG. It runs like a champ. I've run the crappiest ammo through it and have never had an issue.

What magazine brand are you running?

mudskipper · Oct 23, 2011

love, Love, LOVE my CMMG 9mm.

I use the C-More Colt-pattern magazines. Don't think they make them anymore, but any Colt-pattern mag will work in a CMMG.

gunconnection · Oct 23, 2011

I own a CMMG 9mm SBR. It runs great. Accurate & reliable.

Ooops · Oct 24, 2011

annihilation-time said:
What magazine brand are you running?

Metalform 20 rounders and CProducts 32 rounders.

gunconnection · Oct 24, 2011

Metalform

Bigpapa · Oct 24, 2011

I too have the CMMG running 30rd Meatlform mags. Very accurate!

jeff7457 · Oct 24, 2011

CMMG. Runs like a scalded dog. No issues and I run cheap ammo. Dan over at Gun Connection built it for me.

apexinm3 · Oct 24, 2011

CMMG upper w16" barrel on a S&W lower here. 100% reliable with Metalform/Colt mags (I have both) and will eat ANYTHING I've given it so far. The plastic mags don't feed well, try to stay away from them (P-mag I think). No experience with the RRA but those I know who do have them seem to like them. It's a roll of the dice as near as I can tell, either is nice.

Good luck an enjoy, 9mm AR carbines are a hoot. Especially suppressed!

annihilation-time · Oct 24, 2011

apexinm3 said:
CMMG upper w16" barrel on a S&W lower here. 100% reliable with Metalform/Colt mags (I have both) and will eat ANYTHING I've given it so far. The plastic mags don't feed well, try to stay away from them (P-mag I think). No experience with the RRA but those I know who do have them seem to like them. It's a roll of the dice as near as I can tell, either is nice.

Good luck an enjoy, 9mm AR carbines are a hoot. Especially suppressed!

I think you mean ProMag. They usually don't get good reviews. Pmags are quality magazines.

Most of what I've read says that the RRAs are reliable after some fine tuning. It's hard to find someone anywhere online complaining about their CMMG 9mm, so I think I'll be putting one together sometime between now and the end of the year.

Thanks for the info guys.

dwnthehatch · Oct 24, 2011

Sorry to throw this thread off-track. I was trying to choose between the two myself until I was introduced to the Just Right Carbine. I really didn't want to shell out the money for more mags and the fact that it took Glock magazines sold me. It's around $600, all metal, uses an AR-15 trigger group, rail and stock. You can change the charging handle and ejection for left or right handed shooters. You can also change between 9mm, .40, and .45 barrels in less than 5 mins. I have had 0 problems with it shooting suppressed/unsuppressed. I had the barrel threaded by Midcounty but still couldn't build a true 9mm ar15 for less.

apexinm3 · Oct 24, 2011

annihilation-time said:
I think you mean ProMag. They usually don't get good reviews. Pmags are quality magazines.

Most of what I've read says that the RRAs are reliable after some fine tuning. It's hard to find someone anywhere online complaining about their CMMG 9mm, so I think I'll be putting one together sometime between now and the end of the year.

Thanks for the info guys.

You are absolutely right, it's ProMag which makes the problem magazines. Got the two confused but you figured it out.

Mine is probably one of my favorite weapons, you will likely have a blast with yours, too. Good luck!

jmira · Oct 24, 2011

gunconnection said:
I own a CMMG 9mm SBR. It runs great. Accurate & reliable.

that gun is sweet!

stovepipe · Oct 24, 2011

I have a RRA 9mm upper on a spikes lower and have had zero issues with it so far. I have heard a lot of good things about the cmmg rifles as well though.

LONGSHOT · Oct 24, 2011

LOOKA-T THE DUAL CAL JUST RIGHT CARBINE.MINE NOW HAS ALITTLE OVER 1650 WITH-OUT A HIC-CUP

Bart_man · Oct 24, 2011

ALL OF YOU GUYS WHO POSTED "I have..."

:needpics:

9mm AR: CMMG or RRA?

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