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Thread: Aero Upper won't fit

  1. #11
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    Quote Originally Posted by C4IGrant View Post
    Ah yes, AP. Now I remember why we do not use their parts any more.



    C4
    Grant, Who do you feel offers more consistent or better lowers/uppers? I personally like mega products, but they are hard to come by right now.

  2. #12
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    And the flood of garbage into the AR world has officially begun.
    "You people have too much time on your hands." - scottryan

  3. #13
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    According to some drawings, the recess the rear lug of the upper fits in should be 0.500 + .000/- .004 wide, 0.950 long, and 0.630 deep.

    Might give you a better idea what's out of spec. I've got 3 rifles built with AP uppers and they all fit well.
    Last edited by LeviTX; 02-13-13 at 14:17. Reason: blueprint measurement reading fail

  4. #14
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    Before filing or defiling anything, check the RE and check the buffer & BCG for interference. On my ARs, sometimes the upper & lower cannot be closed without the BCG hitting the buffer.

    Also make sure the pin isn't sticking in too far & causing interference
    Last edited by MistWolf; 02-13-13 at 11:09.
    INSIDE PLAN OF BOX
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  5. #15
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    Quote Originally Posted by txbonds View Post
    Grant, Who do you feel offers more consistent or better lowers/uppers? I personally like mega products, but they are hard to come by right now.
    BCM. Colt. Noveske. DD.



    C4

  6. #16
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    Quote Originally Posted by C4IGrant View Post
    BCM. Colt. Noveske. DD.



    C4
    Not exactly easy brands to get right now.

  7. #17
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    Re: Aero Upper won't fit

    Unless my calipers are off:

    Width


    Lower width


    Sent from my HTC Sensation 4G using Tapatalk 2

  8. #18
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    Re: Aero Upper won't fit

    Quote Originally Posted by The_Hammer_Man View Post
    Please use a "slick sided" bastard file. ( a file with smooth untoothed edges. can be found at harbor freight in the jewelry tool section)

    Secondly.. one stroke per side in an alternating fashion. This, hopefully, will keep your material removal even.
    Before setting mind to purpose, is there anything I should keep in mind? Should I contact Aero first and see what they say?

    As for the metal, is there anything I can apply to the receiver once it has been filed?

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  9. #19
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    so .003 off. I would chalk it up to tolerance stacking and not junk parts like so many like to claim right off the bat. If it was .03 off than I would suspect junk parts, but .003, tolerance stacking IMO. Probably one swipe with a file on each side will get it to fit.

    Although if what LeviTX posts as the "spec" for the inside of the rear pin area than both parts are WAY off, but I find it hard to believe that both parts would be .05 off from the spec.

    ETA: before you blame Aero do you have other uppers you can check? Or other lowers? I never thought Aero turned out junk, but I would be more suspect of the lower since I personally have never heard of Delaware Machine.
    Last edited by rjacobs; 02-13-13 at 12:59.

  10. #20
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    Quote Originally Posted by rjacobs View Post
    so .003 off. I would chalk it up to tolerance stacking and not junk parts like so many like to claim right off the bat. If it was .03 off than I would suspect junk parts, but .003, tolerance stacking IMO. Probably one swipe with a file on each side will get it to fit.

    Although if what LeviTX posts as the "spec" for the inside of the rear pin area than both parts are WAY off, but I find it hard to believe that both parts would be .05 off from the spec.

    ETA: before you blame Aero do you have other uppers you can check? Or other lowers? I never thought Aero turned out junk, but I would be more suspect of the lower since I personally have never heard of Delaware Machine.
    I have a long history of dealing with AO. We have learned painful lessons and is why we and companies like BCM no longer do business with them.


    C4
    Last edited by C4IGrant; 02-13-13 at 13:17.

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