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Thread: Best AR that takes Colt SMG Mags?

  1. #1
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    Sep 2010
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    Best AR that takes Colt SMG Mags?

    Pretty simple question:

    What's the bet 9mm AR that takes the Colt SMG mags?
    I'm aware of the Colt 6951 but are there any others with any benefits?

    Thanks

  2. #2
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    Mar 2012
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    I like black creek precision’s reduced magwell lower. Doesn’t use a long finger bolt catch, and has a few nice embellishments.

  3. #3
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    Hammer27,

    I really like my CMMG Mk9 T. It has a dedicated 9 mm lower (unlike the Colts) and a Keymod handguard. The bolt and bolt carrier is the same as Colts. The Brownells magazines I purchased run great. It also has a mil spec buffer tube. I have 500 rounds through it thus far without issues.

    https://www.cmmginc.com/product/rifle-mk9-t-9mm/

    Quarter Circle 10 is also a popular brand, but I have never shot one so I cannot comment.

  4. #4
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    Quarter Circke 10 is the nicest I’ve ever had in hand.
    I have a CMMG as well, it’s a bit cheaper, traditional shape receiver and is rock solid reliable.
    Last edited by hk_shootr; 01-31-18 at 15:28.
    Proper Planing Prevents Piss Poor Performance.......

  5. #5
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    There's also a mag well block (Hahn?) that inserts into stock AR lowers. It worked well. I sold when the mags choked with HST and Gold Dot rounds.

  6. #6
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    I have a Colt patterned QC10 lower. After I got the buffer and buffer spring configuration down, it runs flawlessly.

    Sent from my XT1635-01 using Tapatalk

  7. #7
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    QC10 is a great choice for Colt pattern lowers

    I too like the QC10 lower - very nice, excellent quality. I have a video here of my build, using a Mas Defense side charging upper with the QC10 lower.

  8. #8
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    Quote Originally Posted by Shrine View Post
    I too like the QC10 lower - very nice, excellent quality. I have a video here of my build, using a Mas Defense side charging upper with the QC10 lower.
    Very nice! My build is similar but without the side charging upper. How do you like the side charging compared to the traditional charging method?

    Sent from my XT1635-01 using Tapatalk

  9. #9
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    Quote Originally Posted by Klingkong251 View Post
    Very nice! My build is similar but without the side charging upper. How do you like the side charging compared to the traditional charging method?

    Sent from my XT1635-01 using Tapatalk
    Awesome build brother - looks great! I really dig the small sub ar9's like these. And the side charger is cool, works nicely on this build so far, so no complaints here.

  10. #10
    Join Date
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    I have the DDLES, precursor to the QC10 lower.

    While that company sucked and took lots of peoples $$$, I was able to get a lower out of them easily and it's been a great Colt Pattern lower with a YHM 9MM SBR upper setup.

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