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Posted: 2/18/2011 3:17:06 PM EDT
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Shot my AR today and the trigger jammed up after about 15 rounds. Just wouldn't budge, so I figured I look at it at home.
Took it apart and it turns out there was an expended primer stuck in it. Nothing broken at all, just a small bit of brass gumming up the works. This is the first primer I've seen come out of the casing, is this very common? Any way you think I could have cleared this in the field? |
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Quoted:
Shot my AR today and the trigger jammed up after about 15 rounds. Just wouldn't budge, so I figured I look at it at home. Took it apart and it turns out there was an expended primer stuck in it. Nothing broken at all, just a small bit of brass gumming up the works. This is the first primer I've seen come out of the casing, is this very common? Any way you think I could have cleared this in the field? what brand of ammo was it? |
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Quoted:
Quoted:
Shot my AR today and the trigger jammed up after about 15 rounds. Just wouldn't budge, so I figured I look at it at home. Took it apart and it turns out there was an expended primer stuck in it. Nothing broken at all, just a small bit of brass gumming up the works. This is the first primer I've seen come out of the casing, is this very common? Any way you think I could have cleared this in the field? what brand of ammo was it? XM193 in the tan boxes. LCC headstamp. |
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I had that happen with some brass cased Monarch I got for 3.50/box at Academy. This was within my first~300 rounds of firing my first AR, a M&P15T. I used the forward assist in an attempt to close the action... bad idea. When I finally broke the gun open, the primer was firmly crimped onto a bolt lug. I learned my lesson about the FA. |
Lost one with a hot handload in mine... pretty sure it was jammed somewhere near the cam pin... was the worst monster ever to get that carrier to move. Broke buttstock and bent charging handle slightly tryig to slam it out, finally had to take apart buttstock and unscrew buffer tube, and knock the bolt carrier out with a punch... why does the military crimp primers in again 
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Transition to side-arm!
Fix it when the area is cleared. Quoted:
Shot my AR today and the trigger jammed up after about 15 rounds. Just wouldn't budge, so I figured I look at it at home. Took it apart and it turns out there was an expended primer stuck in it. Nothing broken at all, just a small bit of brass gumming up the works. This is the first primer I've seen come out of the casing, is this very common? Any way you think I could have cleared this in the field? Posted Via AR15.Com Mobile |
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I have had it happen before with reloads. Had one blown primer end up in the gas carrier key. Essentially had a single shot. Took forever just to figure out what happened and find the offending primer. No idea how it actually ended up in there or how it even fit, but there it was. No way to fix that in the field.
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| I have had it happen one time ever. DPMS sells a little rubber thing that blocks a blown primer from getting stuck in the trigger. I ordered one but once I got it in my hands I decided it was probably more likely to have a jam from the rubber part, so never put it in. |
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Quoted: That's one of the problems with the federal XM193 that our PD had problems with, hot stuff and primers weren't crimped sufficiently. We had trouble in our issue Colts and personal rifles of different makes with popped primers causing malfunctions. I disassembled some new XM193 we were having problems with and was able to put a fresh primer in the pocket and seat it with no difficulty. No crimp to speak of. With a properly crimped primer pocket, you have to remove the crimp to seat a new primer, not so with the stuff giving us fits. Meh, it's training ammo. We just shot the stuff up and ordered more. I have heard of this quite a bit on this forum and at the range. So much for crimped primers!!!!  |
| I've only seen it with Federal Nato stamped, Privi and one Winchester. Think I've got 6 or 7 out of about 20K. Never found the primers in every instance. Only knew it because it wasn't in the case. Never had it happen with anything else and I save 99% of my brass for reloading. They could have fallen out during ejection but it didn't seem to have an effect on the shot. |
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DPMS makes a product called a "receiver rug" to prevent this sort of stoppage. It's a plastic/rubber piece that goes over the hammer and blocks stuff from getting down below and blocking the trigger parts. It's cheap.
But then it really sounds like it's the ammo that's the problem here, so I'm wondering how frequent and common this is. |
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Quoted:
Shot my AR today and the trigger jammed up after about 15 rounds. Just wouldn't budge, so I figured I look at it at home. Took it apart and it turns out there was an expended primer stuck in it. Nothing broken at all, just a small bit of brass gumming up the works. This is the first primer I've seen come out of the casing, is this very common? Any way you think I could have cleared this in the field? I had this happen with some old reloads. I just wanted to see if the weapon would run with them. Lesson learned.... To clear in the field, remove the mag and 'bounce' the rifle on the buttstock a few times until you see or hear the carrier move. Concrete works nicely. When the carrier moves, pull the CH back and lock the bolt, tilt, and shake. I usually leave the mag in and make sure that the weapon is pointed in a safe direction, clear, and carry on. YMMV |
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