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Posted: 6/12/2008 2:31:42 PM EDT
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Hey guys, I'm still new to ARs so bare with me. I just noticed today a potentialy dangerous issue with my 7.62x39 AR. I was out hunting some varmit on the property and, when I unloaded an unfired round I noticed the primer had a slight nick in it from the firing pin. I was using Golden Tiger that has a slightly inset primer. The bolt does have about .010" shaved off it and the firing pin has been smoothed down at the neck. The firing pin still floats freely and doesn't protrude the face of the bolt when all the way back. I'm wanting to know, is it common to see a nick in the primer of a cartridge that had been loaded and not fired? Why is it happening since the pin is floating freely. And, will I be looking for trouble when using domestic ammo with flush primers? Any thoughs or info is appreciated. Thanks, Andrew |
| This is totally normal for all AR-15s. The firing pin floats and does peck the primer when the bolt slams home but does not have anywhere near the amount of inertia or energy needed to set off the primer. Unless the FP gets stuck in the forward position or you have a very high primer (then the bolt face would set it off, not the FP) I have never heard of any documented slam fires. |
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I have 6.8 and 5.56 ARs....all of them leave small "dings" in the primer after loading into the chamber. I'm not an expert, so definitely wait for someone else to chime in....but many military firearms don't have a firing pin with a spring around it (I forget the technical term) so you have an increased risk of slam fire when chambering a round....so always chamber the weapon in a safe direction. That's one of the things about the Magpul Massada or Bushmaster ACR....the firing pin has been made to reduce the risk of accidental discharge. HTH a little. Sean |
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It's normal in an AR and won't normally fire the round, but I did have a report from one of the very first .458 SOCOM customer's, that he had a round go off during chambering. He was single loading the cartridges directly into the chamber and then dropping the bolt home on it. With the pistol primers, he had a couple go off. Tony |
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