.223 piston & polymer

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  • phil evans
    Member
    • Sep 2010
    • 99
    #1

    .223 piston & polymer

    added adams arms, piston, 1 in 7, melonite, upper to new frontier polymer lower.
    its a experiment, did due diligence as to why frontier arms and adams arms.
    want to see what it's all about with pistons?
    will see if things start crumbling/cracking/melting.

    yesterday, 60 down range- no problems at all.
    trigger very heavy, maybe ~10 pounds.
    ~ 2.5moa with factory.

    new frontier armory will send me a lighter trigger spring.
    already mollied trigger surfaces to see how that works.
    Last edited by phil evans; 09-06-2013, 08:07. Reason: update
    ALL incumbents OUT
    A&M'61,NRAlife'61.
    Tags: None
    • Darreld Walton
      Senior Member
      • Sep 2009
      • 632
      #2
      I used a New Frontier lower last year to build a dedicated .22 LR with a CMMG upper. I had to replace the hammer/trigger setup to a non-notched outfit to work with the CMMG bolt. I also stepped up and put a RR two-stage into it at that time. I also, from time to time, swapped the upper for an M4-type that I'd put together, and didn't have a single problem with it. It didn't loosen up, burn down, melt, distort, have the holes loosen up, and for under a C note when I bought the thing. I have no problem whatsoever buying another one.
      I too have it in mind to go with a piston setup at some point, but just got hammered with a big tax bill from the state, so it has to go on the back burner for awhile.
      In the meantime, the New Frontier lower now wears a collapsible butt, and with the .22 LR upper, has become a favorite of the Grandkids!!!

        Comment

        • p246
          Senior Member
          • Mar 2013
          • 2216
          #3
          If you shoot a lot of hot stuff watch for wear under the top of upper receiver due to bolt tilt. Not manufacturer specific just a design issue in AR's that have op rod/pistons designs added.

            Comment

            • S.B.
              Senior Member
              • Aug 2009
              • 241
              #4
              Are these legal in Service Rifle competition? Just me but, I don't see the need? I always thought Eugene Stoner a pretty savvy hombre, his stuff has lasted in our military history far longer than most.
              Steve
              Last edited by S.B.; 10-13-2013, 08:27.
              The Original Point and Click Interface was a Smith & Wesson

                Comment

                • Jim in Salt Lake
                  Senior Member
                  • Aug 2009
                  • 854
                  #5
                  Piston uppers aren't legal in service rifle, either NRA or CMP. In NRA they'd be classified as a match rifle. For across the course competition, I don't think the piston system give you anything other than more complexity and more stuff changing barrel harmonics.

                    Comment

                    • Tuna
                      Senior Member
                      • Aug 2009
                      • 2686
                      #6
                      And as one well known maker of AR-15 rifles said that it's something else that can go wrong on a system that was never designed for it.

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