Adam B Posted November 21, 2006 Share Posted November 21, 2006 This scared the sh!t out of me the other day, I loaded up my mag, put it in the gun, released the slide stop and bang, the gun fired. This has never happened before and it has only happened with this ammo ( several times ). This just started so I am going to try some different ammo since I am only having this problem with precision delta ammo. Any ideas on what would cause this??? Link to comment Share on other sites More sharing options...
al503 Posted November 21, 2006 Share Posted November 21, 2006 Are you using an extended firing pin? Link to comment Share on other sites More sharing options...
Adam B Posted November 21, 2006 Author Share Posted November 21, 2006 I am not sure I just traded into the gun, I have a normal length one laying around that I will put in to see if it makes a difference. Thanks for the input! Link to comment Share on other sites More sharing options...
DougCarden Posted November 21, 2006 Share Posted November 21, 2006 I cant think of a reason why a gun would slam fire due to a certain brand of ammo. It would be helpful to know what kind of gun, is it modified, etc? Obviously it may need to go to a smith for a look see..... DougC Link to comment Share on other sites More sharing options...
Matt Cheely Posted November 21, 2006 Share Posted November 21, 2006 Is the hammer dropping to fire it? Maybe precision delta uses softer primers? Link to comment Share on other sites More sharing options...
BritinUSA Posted November 21, 2006 Share Posted November 21, 2006 I would check the firing pin spring. It may be a tad weak. Also check the firing pin hole and make sure that the pin can't get stuck in there. If it was sticking out by a tiny amount when the slide went forward then it could cause the detonation. Link to comment Share on other sites More sharing options...
Micah Posted November 21, 2006 Share Posted November 21, 2006 If it's a Glock, the spring under the firing pin safety plunger might be missing or on its side. Link to comment Share on other sites More sharing options...
Mark A Posted November 21, 2006 Share Posted November 21, 2006 This scared the sh!t out of me the other day, I loaded up my mag, put it in the gun, released the slide stop and bang, the gun fired. This has never happened before and it has only happened with this ammo ( several times ). This just started so I am going to try some different ammo since I am only having this problem with precision delta ammo. Any ideas on what would cause this??? What kind of gun is it? Link to comment Share on other sites More sharing options...
Adam B Posted November 21, 2006 Author Share Posted November 21, 2006 The gun is a custom built STI, from what I could tell the hammer wasn't drop firing. The gun only has about 500 rounds through it so I am dismissing the firing pin spring being bad. I am seriously baffled but I am going to swap out the firing pin with a standard length one and see what happens. Link to comment Share on other sites More sharing options...
Mark A Posted November 21, 2006 Share Posted November 21, 2006 The gun is a custom built STI, from what I could tell the hammer wasn't drop firing. The gun only has about 500 rounds through it so I am dismissing the firing pin spring being bad. I am seriously baffled but I am going to swap out the firing pin with a standard length one and see what happens. Im with britin, spring might be weak even if it is new, or the pin was protruding. Link to comment Share on other sites More sharing options...
Adam B Posted November 21, 2006 Author Share Posted November 21, 2006 I think I will swap both out just to be safe. Link to comment Share on other sites More sharing options...
Mark A Posted November 21, 2006 Share Posted November 21, 2006 I think I will swap both out just to be safe. If the hammer didnt drop, can only be so many things. That would scare the shit out of me too. Link to comment Share on other sites More sharing options...
Crusher Posted November 22, 2006 Share Posted November 22, 2006 My guess is a cracked/broken firing pin spring causing the firing pin to stay protruded (after all that dry firing) once the gun is loaded and it slam fires the pin is recessed and will not slam fire again until you dry fire it. When you pull the firing pin and spring look for a broken coil or section. Link to comment Share on other sites More sharing options...
Adam B Posted November 23, 2006 Author Share Posted November 23, 2006 Update!!! Today I decided to fire some factory rounds through the gun and other than having issues with failure to feed (too damn short) they all went off without a hitch. I did notice when I cycled the slide that I got hammer follow a couple of times, but it only happened when I cycled the slide as far back as it could go and it never happened when I shot or chambered the gun. Can the sear and hammer be rescued or do I need to invest in a new set? Link to comment Share on other sites More sharing options...
Joe D Posted November 23, 2006 Share Posted November 23, 2006 Try adding some tension to the left "finger" of the leaf spring first. Link to comment Share on other sites More sharing options...
Adam B Posted November 23, 2006 Author Share Posted November 23, 2006 will do Link to comment Share on other sites More sharing options...
Sean Gaines Posted November 23, 2006 Share Posted November 23, 2006 Try adding some tension to the left "finger" of the leaf spring first. also try using a lighter recoil spring. I think your slide is comming forward to hard and causing the sear to be jared off the hammer. I think your situation is caused by too light of a trigger job and too much recoil spring. Link to comment Share on other sites More sharing options...
Steve Moneypenny Posted November 23, 2006 Share Posted November 23, 2006 Lot of good explanations, bottom line hammer follow shouldn't be happening, Like said I would add some tension to the sear spring. (only take guns appart and work on them if you are comfortable doing so make sure the firing pin doesn't stick out of the gun as it's going into battery if it still happens. There is no good reason for this to happen. Lot of good explanations, bottom line hammer follow shouldn't be happening, Like said I would add some tension to the sear spring. (only take guns appart and work on them if you are comfortable doing so make sure the firing pin doesn't stick out of the gun as it's going into battery if it still happens. There is no good reason for this to happen. or I should say allow to continue happening. Link to comment Share on other sites More sharing options...
Mark A Posted November 24, 2006 Share Posted November 24, 2006 Dude, Steves right on the money, Sear spring is probably set to light, action on the slide going to battery drops hammer. Other factors may include sear to hammer fit, and we could go into disconnectors ect. Light "feeling" is not always accomplished by reducing spring pressure. Theyre are other ways, and be dependable. Link to comment Share on other sites More sharing options...
Adam B Posted November 24, 2006 Author Share Posted November 24, 2006 the sear spring was the culprit, it was too light, I added some more tension to it and the hammer doesn't follow now. Thanks everyone for the tips! Link to comment Share on other sites More sharing options...
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