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Is this malfunction possible?

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  • jcaoloveshine
    Veteran Member
    • Dec 2007
    • 2654

    Is this malfunction possible?

    Let's say you have a DA/SA gun. Is it possible for the gun to accidentally reset to DA mode even after you've fired the first shot? What could cause this?
    sigpic
  • #2
    luckystrike
    Veteran Member
    • Feb 2009
    • 4176

    it is possible, not sure what the part is called but something is not catching/reseting properly. that is my professional noob answer. why do you ask? are you experiencing this problem?

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    • #3
      The SoCal Gunner
      Veteran Member
      • May 2006
      • 3319

      I'm guessing you are talking about a failure in the pistol mechanism and not a light strike or bad primer. Sure why not? Just means something is wrong.

      Comment

      • #4
        The SoCal Gunner
        Veteran Member
        • May 2006
        • 3319

        Did it chamber the next round?

        Comment

        • #5
          dfletcher
          I need a LIFE!!
          • Dec 2006
          • 14794

          I'm not the best on SA/DA semi auto pistols, but if the first round was fired and had enough "oomph" to eject but not enough to cock the hammer I presume the hammer would follow the slide forward - much like it does on a semi auto long gun - exception being the long gun doesn't have DA capability.

          Is there a half cock notch on the gun, or none?
          GOA Member & SAF Life Member

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          • #6
            JTROKS
            I need a LIFE!!
            • Nov 2007
            • 13093

            Is it a Sig with a de-cocker that is placed right under the shooter's thumb? I've heard of people accidentally decocking their Sig P228/229 for some reason. What exactly is the model and caliber of the gun?
            The wise man said just find your place
            In the eye of the storm
            Seek the roses along the way
            Just beware of the thorns...
            K. Meine

            Comment

            • #7
              iareConfusE
              Veteran Member
              • Jan 2010
              • 4464

              Originally posted by luckystrike
              it is possible, not sure what the part is called but something is not catching/reseting properly. that is my professional noob answer. why do you ask? are you experiencing this problem?
              Sear/hammer interface. I can imagine if these two contact surfaces are worn, it might slip back into DA, but I don't think I've ever heard of it happening.

              Comment

              • #8
                JTROKS
                I need a LIFE!!
                • Nov 2007
                • 13093

                I just had a recollection of a malfunction that you described and the gun was a FN HP-DA, basically a Browning Hi-Power pistol with DA/SA, but not sure if it had a de-cocker.
                The wise man said just find your place
                In the eye of the storm
                Seek the roses along the way
                Just beware of the thorns...
                K. Meine

                Comment

                • #9
                  scarville
                  CGN/CGSSA Contributor
                  • Feb 2009
                  • 2325

                  I was able to get a Ruger P95 to do that by playing with the decocker. In just the right position, the gun would fire but the hammer would fall back down as the slide moved forward. It wasn't easy but I has some time on my hands that day.
                  Politicians and criminals are moral twins separated only by legal fiction.

                  Comment

                  • #10
                    Wildeman_13
                    Senior Member
                    • Jan 2010
                    • 542

                    I was checking out a Makarov at Cabellas a while back and when I racked and released the slide, the hammer would drop as soon as the slide locked forward. I tried it a few times both with the release and holding it to control the speed forward and it did it every time. I told the gun behind the counter that he might want to have a gunsmith look at it since I doubted the Makarov was supposed to do that.
                    So in this case I could not tell you if the hammer fell and would have set off a round or what since I never loaded it. But mechanical failure somewhere in the parts was causing the hammer to fall after the slide locked forward.

                    Comment

                    • #11
                      jcaoloveshine
                      Veteran Member
                      • Dec 2007
                      • 2654

                      My friend was shooting the FNP this weekend and this happened to him with 1 round of ammo, it could be the ammo tho since I experienced no problem of the sort.

                      He had the gun in SA, fired the gun, and it reset to DA but it did pick up a round in the chamber.

                      Occam's Razor could be at work here, he may have rest his thumb on the decocker and hit it down as the pistol recoiled (he's a 1911 shooter).

                      All the rounds I shot were fine.
                      sigpic

                      Comment

                      • #12
                        reckoner
                        Senior Member
                        • Jan 2011
                        • 721

                        My Beretta Cougar is like this (as are 92s/96s I believe). The safety is also a decocker, so if you rack the slide with the safety on, the hammer falls forward upon slide return. With the safety on, the firing pin is rotated away from the hammer, so it doesn't slam fire. You can't carry it cocked and locked.

                        Maybe that Makarov has a similar saftey/decocker system.
                        Last edited by reckoner; 08-08-2011, 11:28 AM.

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                        • #13
                          J.D.Allen
                          Senior Member
                          • Jul 2010
                          • 2340

                          This is exactly what was happening with my Ruger P-94. I sent it in to Ruger and they replaced the sear.

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                          • #14
                            Wildeman_13
                            Senior Member
                            • Jan 2010
                            • 542

                            Originally posted by reckoner
                            My Beretta Cougar is like this (as are 92s/96s I believe). The safety is also a decocker, so if you rack the slide with the safety on, the hammer falls forward upon slide return. With the safety on, the firing pin is rotated away from the hammer, so it doesn't slam fire. You can't carry it cocked and locked.

                            Maybe that Makarov has a similar saftey/decocker system.
                            It's possible. I wasn't really planning to buy it so I didn't check how old it was or even the actual maker/model. But it was pretty beat up...

                            Comment

                            • #15
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