Can a Magwell Adapter Split the Magwell on a Lower

Discussion in 'AR Talk' started by Krackels, Apr 14, 2009.

  1. Apr 14, 2009 #1
    Krackels

    Krackels XDTalk 25K Member Founding Member

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    I was cleaning my RRA 9mm AR today.

    After looking into the lower and seeing hundreds of rounds of built up crud I decided to clean my lower, something I don't normally do.

    Anyhow to make a long story short I was wiping down the lower and noticed a vertical split running up the front of my magwell.

    My first inclination was that when I had reinstalled the magwell adapter I had over tightened the screw (the magwell was moving before and not seated high enough) and split the magwell, but then I started to think... is the lower that fragile that overtightening a screw in the adapter would cause it to split right down the middle?

    I'll see if I can get you some pics, and I'll call RRA tomorrow to see what they say.

     
    Last edited: Apr 14, 2009
  2. Apr 14, 2009 #2
    ichy_trigger

    ichy_trigger XDTalk 10K Member

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    I am not sure how they mount but its hard aluminum and yes, It could split. Screws allow you to put alot more torque on fasteners than what most would think.
     
  3. Apr 14, 2009 #3
    ORD

    ORD XDTalk 1K Member

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    It could be a combination of things, such as overtightening of the adapter, combined with a flaw in the lower, combined with heavy use...etc.

    I have not seen the magwell of an AR lower split before from overtightening a 9mm mag well adapter, but it is certainly possible.

    Post up some pics...I'd like to see what kind of "split" you are talking about.

    Also, FWIW, I have swicthed to Hahn Dedicated 9mm Blocks in all my 9mm carbines and in ones that I have built for others. LRBHO, uses the standard AR-15 Bolt Catch, requires no "adjustment" for perfect function with Colt/Metalform mags (can't speak to Mod. Uzi, ProMag, C-Products, etc.), and is generally a better design than the RRA as far as I am concerned inasmuch as you aren't "tightening" it against the interior walls of the mag well.
     
  4. Apr 14, 2009 #4
    Krackels

    Krackels XDTalk 25K Member Founding Member

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    Do the Hahn blocks drop in from the top?


    [​IMG]
    [​IMG]
     
    Last edited: Apr 14, 2009
  5. Apr 15, 2009 #5
    ichy_trigger

    ichy_trigger XDTalk 10K Member

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    Thats right down the middle, almost like a casting line but I believe RRA uses forgings. I would definately contact them.
     
  6. Apr 15, 2009 #6
    kaizenboi

    kaizenboi XDTalk 10K Member Founding Member

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    WOW! :shock: Allen, i would agree with Ichy Trigger, contact RRA and see if they can at least repair that (or even replace???).

    Very interesting. I wonder what Mike (mvician) would have to say...
     
  7. Apr 15, 2009 #7
    xd4life

    xd4life XDTalk 3K Member

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    This is the second rifle I seen with that same split. last I heard RRA took care of the rifle but it took them a little bit of time. Search ar15.com for this. There is a RRA rep there that is involved in the forums there and is a good guy to deal with...
     
  8. Apr 15, 2009 #8
    Diocoles

    Diocoles XDTalk 1K Member

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    That looks like.. OW. Hope you get some help with that.
     
  9. Apr 15, 2009 #9
    ORD

    ORD XDTalk 1K Member

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    WOW!! OUCH!! That definitely looks like a manufacturing problem and NOT anything that could have been caused by your mag block. RRA should step up on that one.

    As for the Hahn block...yes, the dedicated block is a top installing block. They make several different models, including the dedicated which requires removal of the bolt catch roll pin and bolt catch to install the block. The block is then inserted, the bolt catch and roll pin reinstalled, and that way the block actually uses the standard AR-15 bolt catch which is MUCH stronger than the 9mm unit. The downside to the dedicated block is that it take a little more work to uninstall it from the lower if you are switching back and forth between 9mm and 5.56/223 uppers. Hahn also makes a top loader, and a bottom loader mag block as well. Check out their site for more info...great products though and I highly recommend them!!

    Hahn Precision > AR-15
     
  10. Apr 15, 2009 #10
    Krackels

    Krackels XDTalk 25K Member Founding Member

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    Yeah, I might have to look into that.

    I don't mind RRA's magwell adapter, though. It's pretty solid and never moves once it's in place. It allows the use of the rifle's bolt hold open and the bolt will lock back with Colt, C-Products, and Pro-Mags. It just doesn't lock back with modified UZI mags.

    I'd really love it if they'd replace my lower with one of their new integral magwell 9mm lowers... :mrgreen:

    [​IMG]
     
    Last edited: Apr 15, 2009

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