MEAN 9mm magazine adapter for AR-15

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  • RedTide

    The Water's Fine
    Jul 30, 2013
    177
    Frederick, MD
    I'll be keeping an eye on this. I've been looking for an excuse to get into 9mm PCC.
     

    erwos

    The Hebrew Hammer
    MDS Supporter
    Mar 25, 2009
    13,866
    Rockville, MD
    I'm going to bet it won't. The Guard won't work with a Colt pattern lower.
    I think it's a more complex situation than that (like, if you lowered the mag release and dumped the ejector, it might work), but you are not wrong in practice... I suspect the parent magazine feed lips might get in the way even if you lowered the magazine insert a touch.
     

    teratos

    My hair is amazing
    MDS Supporter
    Patriot Picket
    Jan 22, 2009
    59,775
    Bel Air
    I think it's a more complex situation than that (like, if you lowered the mag release and dumped the ejector, it might work), but you are not wrong in practice... I suspect the parent magazine feed lips might get in the way even if you lowered the magazine insert a touch.

    I can't even get the Guard upper to close on the Colt pattern lower I have (DDLES). The feed ramps attached to the lower stick up and hit the bolt.
     

    bigdv

    Ultimate Member
    May 17, 2010
    1,297
    Calvert Co.
    We have newbies here so we should be more specific because someone could get crossed up:

    No, you cannot shoot 9mm out of a standard AR just by obtaining this 9mm mag insert and a 9mm Bolt Carrier Group.

    You must have purchased or built an AR upper with a 9mm barrel to go along with the 9mm mag insert showcased in this thread.

    Carry on.
    This is a great point. I was thinking the same. Dont try to shoot a 9mm with a 223 barrel. Thanks for pointing this out.
     

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