Tightening upper/lower fit

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  • skyfish
    Warrior
    • Mar 2011
    • 194

    Tightening upper/lower fit

    What's the "best" way of doing this? I've seen the wedge, its inexpensive and probably works. Are pins a better way of fixing this? My upper/ lower fit just seems a bit too loose to me.

  • #2
    My Mega lower has an adjusting screw built in to tighten up the upper/lower slop

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    • #3
      Try an accuwedge or even an old foam ear plug. You could go as far as to sand the mating surfaces lightly to clean up the high spots. I wouldn't suggest doing it though I've heard of people doing this with success. Just curious what brand upper and lower??

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      • terrywick4

        #4
        I've heard that an O-Ring on the back works pretty good. Your local auto parts store will have different thickness orings.

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        • #5
          This is a question that come up often, and I can see why. Nobody likes a sloppy fit, it is distracting, and a focus for lack of accuracy. However, it is irrelevant to accuracy, accuwedge, bedding, screw tightening o-rings, ear plugs, or cam pins all tighten the fit but do nothing to improve accuracy. It is hard to accept but a well built but sloppy fitting upper will outshoot a tight fitting upper with a less than best barrel.
          If you really want to find out, I have a JP Tension pin. It sells for $35 + shipping. I will sell you one for $25 shipped to you in the lower 48. Let me know if you are interested by PM.
          Bob

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          • #6
            Originally posted by stokesrj View Post
            This is a question that come up often, and I can see why. Nobody likes a sloppy fit, it is distracting, and a focus for lack of accuracy. However, it is irrelevant to accuracy, accuwedge, bedding, screw tightening o-rings, ear plugs, or cam pins all tighten the fit but do nothing to improve accuracy. It is hard to accept but a well built but sloppy fitting upper will outshoot a tight fitting upper with a less than best barrel.
            If you really want to find out, I have a JP Tension pin. It sells for $35 + shipping. I will sell you one for $25 shipped to you in the lower 48. Let me know if you are interested by PM.
            Bob
            Bingo!

            Comment

            • skyfish
              Warrior
              • Mar 2011
              • 194

              #7
              Thanks for the replies, good to know. Must be more of head thing, thank you Stokes for offer. But if its not going to help guess I don't need that.

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