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[ARCHIVED THREAD] - I Got A Problem----- UPDATE (Page 1 of 2)
Posted: 1/29/2011 12:56:00 PM EDT
| LMT upper brand new 10.5" assembly. When test firing today, I had jam after jam. Changed ammo, same problem. They were fail to eject's. Took apart the bolt, everything looked fine, put it back together, same thing, random sometimes every shot. After inspecting on a stopage I seen that the extractor is hung outward, after pulling the bolt back and releasing again it fixed itself. What the $#$#%$#!! What can I do to fix this or does it need to go back? |
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1. Relax.
2. Did you try more than one magazine? 3. Call LMT Monday, and they'll take care of you.......likely on their dime. The zombies aren't going to attack for at least 3 more weeks, so you'll be gtg. FWIW, I know it sucks....sorry about your frustrations. |
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LMT upper brand new 10.5". When test firing today, I had jam after jam. Changed ammo, same problem. They were fail to eject's. Took apart the bolt, everything looked fine, put it back together, same thing, random sometimes every shot. After inspecting on a stopage I seen that the ejector is hung outward, after pulling the bolt back and releasing again it fixed itself. What the $#$#%$#!! Not to mention this is my second LMT the first one <BRAND NEW MRP> I had problems failure to feed, found after inspection per LMT the feed ramps had burr's. What can I do to fix this or does it need to go back? I wish someone from LMT would respond. Ejector or Extractor... And give a little more detail on "hung outwards"... |
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Extractor.
Ammo xm193 Hornady 55gr Training PMC Bronze Spikes Lower with Spikes buffer Can't seem to repeat the extractor hanging outward thing again, but still failing to pull the shot case out of the barrel all the way, but clearly not pulling the shot case all the way out before the new bullet feeds. Yes, took the bolt carrier all the way down EXCEPT the extractor before shooting and cleaned, when I had problems, I then took the bolt carrier all the way down and pulling the extractor, found nothing that looked wierd. All new Pmags I have no stock on the lower, if that matters. |
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Extractor. Ammo xm193 Hornady 55gr Training PMC Bronze Spikes Lower with Spikes buffer Can't seem to repeat the extractor hanging outward thing again, but still failing to pull the shot case out of the barrel all the way, but clearly not pulling the shot case all the way out before the new bullet feeds. Yes, took the bolt carrier all the way down EXCEPT the extractor before shooting and cleaned, when I had problems, I then took the bolt carrier all the way down and pulling the extractor, found nothing that looked wierd. All new Pmags I have no stock on the lower, if that matters. Did the LMT 10.5 upper come with a LMT FA Carrier & Bolt? If so Is it the enhanced carrier & bolt or standard mil spec? Gene Swanson of LMT has replied very fast to all my question for the last several years. If you havent tried him then do so CALL 309-787-7193 |
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Can you verify that you have both a spring, AND insert beneath the rear of the extractor? If so, what color? LMT Bolt comes with the correct insert /oring I'm aware that it's supposed to. But its also supposed to extract/eject spent casings, and not "hang outward"... There's obviously something not meeting the standard in this case - barring out-of-spec parts, misassembled extractor is the simplest/most likely cause of the signs/symptoms he is describing.... |
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Easiest way to narrow down the issue is to swap BCG's with another, known good rifle. (Assuming you can either drop a no-go gauge in, or have access to another rifle with low-round count BCG to avoid headspacing issues)
If the new upper/different BCG runs fine but the other upper/suspect BCG chokes, you've cut out a range of "suspects" (Gas port diameter, chamber issues, etc) and can focus on one half of the equation... |
| Even if it was a Stag/CMT you should not be having these problems. Stag/CMT carriers and BCG's have always been 100% for me. LMT used to have a real good reputation and this problem seems to be isolated, but thats no help to you now. Just on an off chance check the gas key for tightness and integrity, your "fail to ejects" could be related to short stroking. LMT was or has been using some MIM gas keys that have been reported here to have cracks in them. All the best and be sure to let us know what the problem was when you get it figured out and fixed....<><....:) |
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Even if it was a Stag/CMT you should not be having these problems. Stag/CMT carriers and BCG's have always been 100% for me. LMT used to have a real good reputation and this problem seems to be isolated, but thats no help to you now. Just on an off chance check the gas key for tightness and integrity, your "fail to ejects" could be related to short stroking. LMT was or has been using some MIM gas keys that have been reported here to have cracks in them. All the best and be sure to let us know what the problem was when you get it figured out and fixed....<><....:) When I stated my LMT came with CMT carrier It was to say some time s a LMT upper might not have a LMT carrier/bolt NOT that CMT is BAD 
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The spent case I think never fully leaves the barrel. exactly why i think its undergassed, cause if you can cycle a round by hand then that should mean that theres not enough pressure to fully move teh BCG back far enough to eject the casing am i thinking straight here? |
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Everyone of my LMT Bolt(all 5 of them)got black insert. Not sure that makes a difference. There is also a date code. Something in the order of AX..etc. X being the year of manufacture if I record correctly. yes all lmt bolts have the black insert I never had problems with the blue insert |
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The spent case I think never fully leaves the barrel. exactly why i think its undergassed, cause if you can cycle a round by hand then that should mean that theres not enough pressure to fully move teh BCG back far enough to eject the casing am i thinking straight here? could be OP check the key Call LMT monday or your dealer LOOK HERE OP TRY Dano on the TROUBLESHOOTING FORUM if he is still around TACKED THREAD LMT 10.5 |
| I could have been seeing things when I thought I saw the extractor hanging outward, maybe I was trying to blame something too quick. I have taken apart the BCG several times and inspected everything. The spring is strong and the extractor seems to be working correctly, holding the rim of a case tightly. The ejector is strong. Nothing seems out of alignment. Can't tell the maker of the BCG. |
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I could have been seeing things when I thought I saw the extractor hanging outward, maybe I was trying to blame something too quick. I have taken apart the BCG several times and inspected everything. The spring is strong and the extractor seems to be working correctly, holding the rim of a case tightly. The ejector is strong. Nothing seems out of alignment. Can't tell the maker of the BCG. MP mark on bolt |
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I bought this upper from a guy in a local forum.
This was a new replacement upper shipped late Dec. 2010 Item: L900L08 10.5" FLTP CL THRD BRRL ASSY The guy told me he sent back a damaged upper and LMT sent him this new replacement, I have box, packing, invoice, and shipping info. |
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I bought this upper from a guy in a local forum. This was a new replacement upper shipped late Dec. 2010 Item: L900L08 10.5" FLTP CL THRD BRRL ASSY The guy told me he sent back a damaged upper and LMT sent him this new replacement, I have box, packing, invoice, and shipping info. Thats scary to me 3rd??? Did you check check trouble shooting forum LMT 10.5 |
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Carrier key stacking? Looks to be correct, what will it look like if it's not right.
Does LMT have markings on the BCG? Wondering if I got shitted from this guy with a shitty BCG in the LMT upper. It was suppose to have been never fired straight from LMT. It looked the part, no brass markings from being fired and the current BCG looks not worn. I will have to get a BCG from a friend and see what happens, if the problem goes away with a different BCG then my problem was I got f'd, if it continues then...... we will see. |
[ARCHIVED THREAD] - I Got A Problem----- UPDATE (Page 1 of 2)
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