Page 2 of 5 FirstFirst 1234 ... LastLast
Results 11 to 20 of 44

Thread: Receiver jiggle

  1. #11
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,902
    Feedback Score
    104 (100%)
    A few days ago I was examining an M4 belonging to one of the team guys that we work with. He had an "accucrap" in his lower. It was almost split in half. When I showed him he said, "damn that could have come apart in my lower and caused problems". He promptly threw it away.

    They don't serve a purpose other than to make people believe that they are solving a problem that doesn't exist.



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  2. #12
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    27,214
    Feedback Score
    14 (100%)
    Trying to mate a stripped upper won't tell you anything unless you put a BCG in it.

    The back of the BCG tensions against the buffer and makes the two halves tighten up.

    Too often people will come on the boards complaining about receiver fit and they don't even have the buffer system installed. Then you get 20 bad replies.

  3. #13
    Join Date
    Jan 2010
    Location
    Illinois
    Posts
    911
    Feedback Score
    22 (100%)
    Quote Originally Posted by Iraqgunz View Post
    They don't serve a purpose other than to make people believe that they are solving a problem that doesn't exist.
    Exactly, It's business 101. Create a problem then sell the solution. That "twang buster" thing comes to mind as well...
    WTB:
    SA M-7 Classic blonde stock sets
    Bulgy ((10))/((E)) steel mags
    Bulgy T3 takeoff stock sets
    30-caliber magazine clips?

  4. #14
    Join Date
    Dec 2008
    Posts
    5,117
    Feedback Score
    7 (100%)
    Quote Originally Posted by Iraqgunz View Post
    A few days ago I was examining an M4 belonging to one of the team guys that we work with. He had an "accucrap" in his lower. It was almost split in half. When I showed him he said, "damn that could have come apart in my lower and caused problems". He promptly threw it away.

    They don't serve a purpose other than to make people believe that they are solving a problem that doesn't exist.
    Maybe the actual brand name ones or the orange ones....but you cannot split the black rubber ones.....you cannot even cut through it unless you have industrial type scissors.

  5. #15
    Join Date
    Nov 2008
    Location
    Northern Virginia
    Posts
    716
    Feedback Score
    61 (100%)
    A little wiggle is a good thing. Unfortunately I learned this the hard way when I bought my first rifle which used a VLTOR MUR upper receiver.

    The fit was extremely tight on both my LMT and Noveske Lowers. It as a huge PITA removing the upper from the lowers with how tight the fit is between them. I have to use a punch when I want to disassemble this rifle.

    With looser fitting uppers and lowers it is never a problem taking the rifle apart without any tools.

    I am NOT an expert by any stretch but I don't see a benefit in a tight fitting upper and lower receiver when it comes to the AR15 platform.

  6. #16
    Join Date
    Feb 2008
    Location
    under a rock
    Posts
    2,138
    Feedback Score
    2 (100%)
    if the Ar needed a Accu-wedge: ,Stoner would have put one there
    I would Not worry to much about it.
    What Upper and what Lower Are you Using ?

  7. #17
    Join Date
    Aug 2007
    Location
    Tennessee
    Posts
    912
    Feedback Score
    0
    Stick a loaded mag in the rifle and see how much wobble you have.Even a empty mag tightens up the wobble in my AR's.
    If you want to try something to remove a bit of wobble,get a set of the Armalite NM oversized pivot and take down pins and see what that does for you.
    Beyond that I'd avoid the accuwedges and the like products.I cut them down and used them for years on my NM and varmint guns without seeing one fail or come apart.But I have seen the wedges flip up out of their seat when the upper was opened and end up in the FCG if your not paying attention.On a target gun its a pain in the ars...has no place at all on a defensive weapon of any sort.
    Glock Certified Armorer
    Armed Protective Services II

  8. #18
    Join Date
    Aug 2008
    Location
    Georgia
    Posts
    440
    Feedback Score
    1 (100%)
    A $10 part from ArmaLite will solve the problem and not cause any new ones that I am aware of:

    http://www.armalite.com/ItemForm.asp...d-8a3c238a7007
    Last edited by rljatl; 05-28-10 at 20:37.

  9. #19
    Join Date
    May 2010
    Posts
    31
    Feedback Score
    3 (100%)
    If it really, really bothers you you can glass bed between the upper and lower. Then you can't use either the upper or the lower with anything else, but at least you'll have a tight rifle.
    Last edited by asme; 05-28-10 at 21:43.

  10. #20
    Join Date
    Feb 2009
    Location
    East Coast
    Posts
    423
    Feedback Score
    2 (100%)
    Quote Originally Posted by TRIDENT82 View Post
    Mil spec is absolutely not a science
    Huh? I fail to see what is non-scientific about an established set of specifications to include minimum and maximum values, acceptable tolerances, etc.

    Engineering definitely falls under what I consider "science."

    Quote Originally Posted by TRIDENT82 View Post
    unlike most people think, its impossible from one batch of ARs to the next to have them machined and finished to the exact same standard everytime
    The standards consist of tolerances and rejection thresholds. The "standard" is not that every part will be 100% identical every time, down to the hair.

    Quote Originally Posted by TRIDENT82 View Post
    If it drives you that mad, try a accu wedge....contrary to what many people think, they will work
    A small sampling of Accu-Wedge threads:

    https://www.m4carbine.net/showthread.php?t=32599
    https://www.m4carbine.net/showthread.php?p=558222
    https://www.m4carbine.net/showthread.php?p=146891

    The "many people" who speak poorly of them here tend to be pretty respected/established members.

    Your gun though.

Page 2 of 5 FirstFirst 1234 ... 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
  •