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Thread: Tightening up receivers

  1. #21
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    I have seen about 5 different uppers that were so tight, you needed a hammer to knock the pins out. Over time the rear lug became worn from knocking the pin in and out repeatedly.

    Quote Originally Posted by AM-15 View Post
    In my case it is not the looseness or rattle per say that bothers me when it is sitting on the table or shaken in my hands.
    What I do not like is when I grip and shoulder the rifle, depending on the amount of grip and pressure from shot to shot, the sights come out of alignment from left to right and have to either shift my head or grip tighter to get everything to line up.
    I like old school, no optics for me.
    I shoot with an "F" marked front sight and removable rear sight bridge(carry handle to some).
    With the Accuwedge installed I do not get the movement in my sights so my head position stays the same on the stock as it should be.
    The wedge will not make the rifle any more accurate but helps me shoot it more accurately with a consistent sight picture.
    Granted, if I really gorilla grip it then I can make the sights move, but not using my natural firmest grip on the rifle while firing.
    Install and removal of the rear takedown pin is easily done with fingers from one hand by just squeezing the two halves together a tad bit using the other hand.
    Do not see how you can wear or oblong holes in the receiver unless over time you are not squeezing the halves together when manipulating the rear take down pin.
    The only reason I use one is it solves my issues with sight alignment while firing.
    YMMV



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  2. #22
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    Quote Originally Posted by Iraqgunz View Post
    I have seen about 5 different uppers that were so tight, you needed a hammer to knock the pins out. Over time the rear lug became worn from knocking the pin in and out repeatedly.
    If the pins were that tight to get in and out, then yes I could see some considerable wear going on.
    But who assembles an AR in that matter.
    Does not make sense to me.
    Were these receivers using a wedge of some sort ?

  3. #23
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    You would be surprised. If you think that gun owners and AR people are beyond being stupid, I recommend getting out more. Yes, they were using Accu-wedges aka Accu-crap.


    Quote Originally Posted by AM-15 View Post
    If the pins were that tight to get in and out, then yes I could see some considerable wear going on.
    But who assembles an AR in that matter.
    Does not make sense to me.
    Were these receivers using a wedge of some sort ?



    Owner/Instructor at Semper Paratus Arms

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  4. #24
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    SUGGESTIONS FROM "THE GOOD IDEA FAIRY'S HANDBOOK"

    I'm thinking about getting a wedge
    Accu wedge
    Accu-Wedge is simplist.
    take any of the steps suggested here
    Accu-Wedge is simplist
    99 cent pair of EAR brand ear plugs
    this is a really good idea for those guys I know who hate loose fit.
    take any of the steps suggested here to tighten it up
    Accuwedge
    When the Accuwedge, EAR plug or other foreign object placed in the fire control group pocket- let me repeat that with emphasis- IN THE FIRE CONTROL GROUP POCKET begins to break down from age, vibration, solvents, lubricants and so on, where do you think the debris is going to go? Or, if that foreign object simply comes loose? That's right- into your Friendly Neighborhood Fire Control Group mechanism, resulting in strange trigger pulls, a weapon that won't fire, a trigger that starts doubling and tripling, or goes full auto until the mag is empty.

    Placing a foreign object in your FCG pocket is like using a floor mat in your car that's going to slide and bunch up against the pedals, or leaving a loose screw in the broom closet of a Blackhawk where it can wedge itself in the flight controls, just to fix an imaginary problem
    Last edited by MistWolf; 06-29-15 at 07:48.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  5. #25
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    Hypothetically could a sloppy upper to lower fit cause feeding issues?

    Mag pic got me thinking

  6. #26
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    If but when these problems are happening to me (rattling, feeding issues, trouble lining up my nose again after a shot) I'm looking to get rid of that rifle in favor of something more friendly. Shirley a 6920 or a BCM would be in my immediate future. Maybe it's just me though.

    ETA: I'm not being a snob. If I want & need one of these toys I want it to work properly.
    Last edited by m4luvr; 06-29-15 at 12:03.

  7. #27
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    Quote Originally Posted by TMS951 View Post
    Hypothetically could a sloppy upper to lower fit cause feeding issues?

    Mag pic got me thinking
    If it's causing feed problems, either the play is beyond allowable limits or some other dimension is wrong
    Last edited by MistWolf; 06-29-15 at 12:27.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  8. #28
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    When I transitioned to the AR-15 to shoot High Power matches years ago my first match rifle had a slightly loose fit between the upper and lower. Once I slung in tight, the looseness was not noticeable. When I purchased a second AR-15 I sought out a rifle with tight upper to lower fit. I did not notice any difference in accuracy at 600 yards between the two rifles.

    If the rifle functions and shoots well I would not concern myself with a little play between the upper and lower.
    Train 2 Win

  9. #29
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    I'm gonna be bold and say that the rifle itself is almost always the last factor at fault.

  10. #30
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    I just helped a new AR shooter clean a accu-wedge out of his FCG over the weekend. He had an older Colt rifle he bought from his Uncle and the FCG locked up on him. I saw a puzzled look on his face and asked if he needed help. I ended up removing the whole FCG, cleaned it and cleaned out the lower. His rifle had an accu-wedge that broke apart in several pieces. Friends don't let friends put foreign objects in their lowers. I've tossed a dozen wedges and ear plugs from friends ARs.
    Last edited by Berserkr556; 06-29-15 at 16:30.

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