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M&P 15-22 mag issues

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  • Divehobo
    Senior Member
    • Apr 2010
    • 1271

    M&P 15-22 mag issues

    I took my son to his first rimfire match last weekend and he can not stop talking about it. He did great with pistol but we had issues with rifle. Four of his five rifle mags arrived a few days before the match, long bodied 10/25. We had no chance to try them before needing them to run. He had a blast and learned a lot about clearing malfunctions. People we were squadded with were awesome, very helpful and ready to lend a hand. RO Terri walked him through a lot about how to run a rifle and clear malfunctions, hats off. Thanks to all the people we were squadded with, great bunch. Pretty sure he is hooked.

    First stage, able to get one or two rounds out before malfunction, clear, run another couple and jam again. Process went on like this through all of new mags, one original mag that came with rifle ran ok. Two guys from squad jumped in, both offering ammo to try. We tried the Remington Gold on stage one. Stage two tried Eley standard that I brought and some borrowed Aquila high velocity but still issues. Stage three more borrowed Aquila and some Federal HV. Stoppages were so bad, DNF last three strings. Stage four is where we were able to borrow another squad mates magazines, short bodied 10 round mags, rifle ran way better. Still had a few jams but he was able to see what it felt like to run at least three strings clean. Big thanks for letting us try your mags.

    Got home and cleaned rifle, ok, couple of days later. Looks fine, not seeing any clearing issues. Took mags apart to see what i could see, nothing. Plastic body factory mags have pin in place to limit to ten rounds, maybe causing issue with springs not rebounding completely? Maybe just need to run mags through gun at practice or static line to get to run smoothly? Any M&P 15-22 shooters have suggestions. Usually factory mags run pretty good out of the box, not so with these ones

    Big shout out and thanks to all who helped Jr during his first rimfire match. RRGC shooters, you guys rock
    NRA Pistol, Rifle, CCW and Metallic Reloading instructor
  • #2
    'ol shooter
    Veteran Member
    • Mar 2011
    • 4646

    Get some actual ten round mags and take them apart. Spray the inside and follower with Pledge furniture spray and wipe clean, they work slick as snot and smell nice too. I do that with my M&P 15-22 and Ruger 10-22 hi cap mags too. The pinned mags are useless in my opinion.
    sigpic
    Bob B.
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    (='.'=)
    (")_(")

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    • #3
      BarrelProof
      Member
      • Mar 2020
      • 157

      I have a new 15-22 with both the long and short 10 round mags.
      Runs flawlessly even with subsonic.

      Don’t know if it effected the reliability, but I did take it apart and spray everything down with dry lube and let it sit a day before assembly and running any ammunition through it

      Did not lube the mags
      If you never leave your first childhood, they'll never know when you've entered your second.

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      • #4
        'ol shooter
        Veteran Member
        • Mar 2011
        • 4646

        Agree, I use One Shot spray cleaner/dry lube on all my rimfire guns and the lockwork of centerfires as well. I like the Pledge for the mags because there are no solvent based carriers and the silicone and wax in the Pledge leaves them pretty slick and like the lemony scent.
        sigpic
        Bob B.
        (\__/)
        (='.'=)
        (")_(")

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        • #5
          Divehobo
          Senior Member
          • Apr 2010
          • 1271

          Guessing there is gonna be some surgery this weekend, mag blocks and teflon dry lube ordered.
          NRA Pistol, Rifle, CCW and Metallic Reloading instructor

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          • #6
            Wordupmybrotha
            From anotha motha
            CGN Contributor - Lifetime
            • Oct 2013
            • 6965

            What kind of malfunctions, light primer strikes, failure to extract?

            Mine had problems extracting. Eventually the factory extractor broke within the first month I had it. I replaced it with Tandem Kross extractor and have had no problems since.

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