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Posted: 12/13/2009 2:48:51 PM EDT
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Not sure what the correct terminology is (slam fire?) for when 2 shots occur with one trigger pull. Have about 500-600 round through the rifle, about 80 today and had about 6 or 7 Fail To Fire and 4 instances of double firing. Before today, I had never had an issue. Anyone have any ideas?
Essential Arms upper / lower 14.5" w/ Phantom2 FH Internals were from the kit that I got from EA. Fired 2 mags of Federal .223 (55gr) without issue, switched to 20 rds of Wolf that I had lying around. First 3 instances of double fire happened with the wolf stuff which didn't seem to have the same 'punch' as the federal. Then switched back to the Federal and had several FTF and one more double shot. Comments on what I should look for first? -Texan |
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YES, get a good light and take a good look down around the FCG. I would even pull the pin and take the parts out if I needed to. It only takes a minute and then you can be sure everything there is in good shape.
The other concern is that with low power ammo when the bolt comes back its not far enough to properly reset the trigger. Still I would want to make certain the trigger mechanism is clean and working properly. You don't want that thing to run away with you. Its a real shock when your rifle decides to empty a full 30 round magazine all on its own. Try it some time! |
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Also if it does it again pull the FCG parts BEFORE you leave the firing line.
That way if someone calls about your automatic, you won't have an issue, no FCG, no problem with authority. If it does it again I would replace the disconnector, they do wear out, not usually that quick but like the above poster it's a cheap fix. |
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I had the same problem about 20 years ago with a couple of AR’s. It turned out I had gotten bad disconnector springs. Same symptoms, anywhere from a few dozen to a few hundred rounds and the weapon would start doubling.
Like Jim I would also advise pulling the FCG if a weapon doubles and depending on how things are where you are maybe leaving the range immediately. |
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Quoted: The other concern is that with low power ammo when the bolt comes back its not far enough to properly reset the trigger. Still I would want to make certain the trigger mechanism is clean and working properly. You don't want that thing to run away with you. Its a real shock when your rifle decides to empty a full 30 round magazine all on its own. Try it some time! That's a scary thought. Can this really happen? |
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Last time I went out I had the same problem with wolf ammo only, switched back to 193 and 855 with a mixture of privi and federal and not a problem. would only double with wolf, I was suspecting that they had soft primers or a combination of that and primers that were not seated to a proper depth being ignited by the floating firing pin? I am not an expert on there things but I took it down, inspected it, did a function test and everything was fine. I know that federal and privi use harder primer cups for that reason.
OP do you still have the packages from the wolf ammo or other boxes from the same batch? What was the lot number if you do? I could only imagine what a run away would be like, the double startled me enough! |
Well I checked the FCG just now and no blown primers in mine, I also checked the disconnector spring and it was large end down
After I go through this batch of wolf I will be done with it, after the 3 doubles in less than five minutes I went back to the LC and PPU for about 200 rounds and had no problem............ |
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