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Little play between my AR upper and lower.

Discussion in 'Maintenance & Gunsmithing' started by caden08, Jan 20, 2012.

  1. caden08

    caden08 washougal Member

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    I have a new build I finished. I grabbed the first lower I could find (CMMG) and put in a DD LPK in and a magpul stock/furniture. At first I thought it was the stock moving around a little bit, but I have found that my BCM upper and lower are moving around a bit. My lock pins are in and strong. I really don't know what to do to get a tight fit. The rifle still shoots great no problems there. Just more of an annoyance... Any fixes/suggestions???


    Thanks
     
  2. Unka-Boo

    Unka-Boo Milwaukie Active Member

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  3. t.huynh

    t.huynh vancouver, wa Active Member

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    Yup, perfectly normal. All mine have had minimal wiggle.

    Probably only really affects you if you're trying to shoot 2000 yards. But with a 5.56
    I don't think it's going to happen.
     
  4. caden08

    caden08 washougal Member

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    Thanks for the idea and knowledge! Good to know it's not operator error :p
     
  5. doubletap007

    doubletap007 Beaverton Active Member

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    even military aircraft parts had +/- .005 when i was working on them.
    if a f-22 rapture can have a little play on the aerators i dont think it will hurt an ar15.i dont mean that to sound rude,just meaning
    that every part is machined a little different so finding a perfect match would be pretty tough.
    think of a free floating barrel,how that moves around to help stableize it.
     
  6. 223murphy

    223murphy Tigard New Member

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    imagesCAJ1V4NC.jpg

    Take off your handle and tap it
     
  7. bruzer

    bruzer Grants Pass, OR Well-Known Member

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    I would have to guess it is normal. Every M16 Uncle Sam issued me had play. Some way more than others. And they all could put rounds in the black at 500 yards.
    Mike
     
    Last edited: Jan 20, 2012
  8. civilian75

    civilian75 Hillsboro, OR Well-Known Member

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    Just what I needed, a pink part for my black rifle:laugh:
     
  9. caden08

    caden08 washougal Member

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    What I was thinking the same thing... Would have to paint that lol!
     
  10. Unka-Boo

    Unka-Boo Milwaukie Active Member

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    It's on the inside....