Page 1 of 11 123 ... LastLast
Results 1 to 10 of 104

Thread: Aero Upper won't fit

  1. #1
    Join Date
    Apr 2012
    Location
    Dallas, Texas
    Posts
    130
    Feedback Score
    5 (100%)

    Aero Upper won't fit

    UPS delivered my stripped Aero Precision Upper and I tried connecting it to my Delaware Machinery Lower. Front take down pin fits perfectly but the rear won't go into the lower.





    I have another upper coming in within the next few weeks. Am I SOL or do I need a new lower? DPMS LPK is installed in lower.

    Sent from my HTC Sensation 4G using Tapatalk 2

  2. #2
    Join Date
    Oct 2009
    Location
    Virginia
    Posts
    2,246
    Feedback Score
    22 (100%)
    Is it the width of the rear lug holding you up? Or is the lug not in the right place?

  3. #3
    Join Date
    Apr 2012
    Location
    Dallas, Texas
    Posts
    130
    Feedback Score
    5 (100%)
    Quote Originally Posted by JBecker 72 View Post
    Is it the width of the rear lug holding you up? Or is the lug not in the right place?
    Width is too big

    Do I need to file it down some?

  4. #4
    Join Date
    Oct 2009
    Location
    Virginia
    Posts
    2,246
    Feedback Score
    22 (100%)
    Yeah just shave it down slightly and it will be fine.

  5. #5
    Join Date
    Oct 2008
    Posts
    410
    Feedback Score
    11 (100%)
    Make sure its not the receiver extension hitting before shaving the upper rear lug.

    Reason I say it is because my mega uppers won't close on my aero lowers unless I back the receiver extension out one turn. Not sure why, as they fit perfectly on mega lowers, but it is what it is for some reason.

  6. #6
    Join Date
    Jan 2010
    Location
    South Central Wisconsin
    Posts
    612
    Feedback Score
    0
    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.
    Quote Originally Posted by markm View Post
    But you should have enough mags that you don't need to see a grief councelor if you destroy or damage one.

  7. #7
    Join Date
    May 2006
    Location
    VA/OH
    Posts
    29,630
    Feedback Score
    33 (100%)
    Ah yes, AP. Now I remember why we do not use their parts any more.



    C4

  8. #8
    Join Date
    Jun 2011
    Location
    Vegas
    Posts
    6,717
    Feedback Score
    5 (100%)

    Re: Aero Upper won't fit

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



    C4
    Is it AP's upper or Delaware Machine lower?
    "I never learned from a man who agreed with me." Robert A. Heinlein

  9. #9
    Join Date
    May 2006
    Location
    VA/OH
    Posts
    29,630
    Feedback Score
    33 (100%)
    Quote Originally Posted by Koshinn View Post
    Is it AP's upper or Delaware Machine lower?
    My guess is that it is the lug on the upper.



    C4

  10. #10
    Join Date
    Dec 2012
    Location
    Texas
    Posts
    547
    Feedback Score
    8 (100%)
    OP, before you file down the lug, would you take calipers to it for measure please?

    This is an opportunity to document.

    Is the lug as a whole cut too wide? Or is there flash/raised material on the edge of a corner from cutting?

Page 1 of 11 123 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •