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Posted: 9/14/2012 11:21:15 AM EDT
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Hello, I'm new this forum and also new ar15. I got my first Ar upper in this forum about 3 weeks ago, some what new with around 50 round count to it. Fire 100 round of PVI 55 gr. two weeks ago with out any problem, yesterday I took it out again to zero a new scope and fired 120 round of the same ammo and Federal also in 55 gr...When I picked up my brass I found that all of the brass has a round ring marks just bellow the neck and about .25 in length, raised and some what bulged. I'm almost certain the first 100 round I fired had the same marks on the shell. I cleaned the rifle each time after shooting and found no debris in the chamber. any ideas what this means? here's what they look like http://img.photobucket.com/albums/v119/islandsnow/Untitled-1.jpg |
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Hello, I'm new this forum and also new ar15. I got my first Ar upper in this forum about 3 weeks ago, some what new with around 50 round count to it. Fire 100 round of PVI 55 gr. two weeks ago with out any problem, yesterday I took it out again to zero a new scope and fired 120 round of the same ammo and Federal also in 55 gr...When I picked up my brass I found that all of the brass has a round ring marks just bellow the neck and about .25 in length, raised and some what bulged. I'm almost certain the first 100 round I fired had the same marks on the shell. I cleaned the rifle each time after shooting and found no debris in the chamber. any ideas what this means? here's what they look like http://img.photobucket.com/albums/v119/islandsnow/Untitled-1.jpg There are a few things that can cause this. Could be a poorly machined area inside the chamber. Check the inside of the chamber for areas that correspond with the marks on the brass. There seems to be excessive powder residue around the case necks. This could be a result of the round not seating properly in the chamber, firing it and then the pressure buckles the brass while allowing a minute amount of gas to escape back into the chamber. You could also have a bad batch of ammo. Can you post some photos of the rims and primers on spent rounds? Look for signs of overpressure. |
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thanks for the reply. I checked the chamber, it looks like theres some kind of rings marks like that of the one found on the casing. I wish I could take a picture but I only have a cell phone camera right now. but took a better picture of the spent casing, I can see that theres also some bulging at the bottom of the case as well. Is this something that I can fix myself or I'll have to take to a gunsmith? http://img.photobucket.com/albums/v119/islandsnow/parts130.jpg Quoted: Quoted: Hello, I'm new this forum and also new ar15. I got my first Ar upper in this forum about 3 weeks ago, some what new with around 50 round count to it. Fire 100 round of PVI 55 gr. two weeks ago with out any problem, yesterday I took it out again to zero a new scope and fired 120 round of the same ammo and Federal also in 55 gr...When I picked up my brass I found that all of the brass has a round ring marks just bellow the neck and about .25 in length, raised and some what bulged. I'm almost certain the first 100 round I fired had the same marks on the shell. I cleaned the rifle each time after shooting and found no debris in the chamber. any ideas what this means? here's what they look like http://img.photobucket.com/albums/v119/islandsnow/Untitled-1.jpg There are a few things that can cause this. Could be a poorly machined area inside the chamber. Check the inside of the chamber for areas that correspond with the marks on the brass. There seems to be excessive powder residue around the case necks. This could be a result of the round not seating properly in the chamber, firing it and then the pressure buckles the brass while allowing a minute amount of gas to escape back into the chamber. You could also have a bad batch of ammo. Can you post some photos of the rims and primers on spent rounds? Look for signs of overpressure. |
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I bought it from a member here. It suppose to have 50 round count on it when I bought it. I'm not sure if a refund is possible. Get a hold of the seller to demand a refund. If you get any grief from the seller, hence he did not discloses that the chamber had problems, and/or will not refund your money, then get staff involved as well to get this resolve. |
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I'm still waiting for his response hopefully we can work this out without a moderator, if not I will get in touch with you. Thanks Quoted: Quoted: Thank you. I sent the seller an email and waiting for a reply. I help moderate the equipment exchange so if you need any help let me know.  |
| I am the seller. I just became aware of the problem. I am in contact with the buyer. My question is this...I traded for this upper from another member on this site in October. He stated the rnd count was 20. I fired 1 mag thru when I got it to make sure it fired. Do I have any recourse? |
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I am the seller. I just became aware of the problem. I am in contact with the buyer. My question is this...I traded for this upper from another member on this site in October. He stated the rnd count was 20. I fired 1 mag thru when I got it to make sure it fired. Do I have any recourse? Yes, same goes for you, and you should contract the member that you did the deal with as well. Bottom line here, the barrel in question should have not been sold as a working unti, but instead sent back to the manufacturer by the original buyer to have it corrected if is came factory that way. If somewhere down the line after the barrel left the manufacturer someone screwed up the chamber (have yet to see photo's of such, and if this is an incorrect reaming job, or someone grooved the hell out of the chamber after the fact) then the problem lies there. But the question does go out, the first time you cleaned the chamber and took a look at it/ fired it back in Oct, why did you not state something then? |
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I traded you that upper. I am certain that that barrel, upper and all other parts were brand new when I put the upper together so I'm a little confused as to how the chamber could be toast. The barrel is a dpms MK12 that I purchased from DPMS at the Machine Gun Shoot at Knob Creek, I did test fire with 50 rounds before I traded it to you almost a year ago. Can you please try to get us pictures of the "ring" you are reffering to inside the chamber?
For the record, I got rid of the upper because I didn't have a use for it. I never had any reason to suspect anything was wrong with it. |
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Here's a picture of the chamber in question. the ring marks in the chamber correspond with the marking found in the spent casing. http://img.photobucket.com/albums/v119/islandsnow/IMG_1552.jpg |
| I would be willing to bet that DPMS would be obligated to take care of this one their dime,dull tooling causes this! Call them and explain, and by all means send them this pic of the chamber,this shouldn't have never made it out of the factory,surprised,DPMS usually has great QC on all of their products...GT27 |
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I have been trying to think about it more, I can't say for sure that I bought it from DPMS' booth. I bought several parts that day and I might have purchased it from JSEsurplus' booth. I went with a few friends and we all purchased several parts and a few uppers that day.
And a correction, after going through emails from last october, I only test fired it 20 rounds. |
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I have been trying to think about it more, I can't say for sure that I bought it from DPMS' booth. I bought several parts that day and I might have purchased it from JSEsurplus' booth. I went with a few friends and we all purchased several parts and a few uppers that day. And a correction, after going through emails from last october, I only test fired it 20 rounds. If it came from JSE Surplus, it would most likely be either Del-ton, DPMS, Wilson or Bulldog. The stampings on the barrel will tell which company it originated from. If it has stippled letters and numbers, it will be Wilson or Bulldog....both are known for manufacturing excellent barrels. Depending on when it was purchased, even if it is stamped DTI, it could still be made by Wilson. OP, what does the barrel stamps show? |
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Glad to see all parties are stepping up to the plate. I am no expert but it almost looks like it was machined that way. yup, chamber reamer whent TU and totally missed any QC. it is quite obvious looking at the last picture. wonder whose gonna fess up and take care of PVT spam? I dont see how any owner missed that one at all....... |
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Glad to see all parties are stepping up to the plate. I am no expert but it almost looks like it was machined that way. yup, chamber reamer whent TU and totally missed any QC. it is quite obvious looking at the last picture. wonder whose gonna fess up and take care of PVT spam? I dont see how any owner missed that one at all....... I agree. I don't see how something like that made it past QC. Personally, I think the best and most ethical way to take care of pvtspam would be to reverse the order of transactions. |
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Glad to see all parties are stepping up to the plate. I am no expert but it almost looks like it was machined that way. yup, chamber reamer whent TU and totally missed any QC. it is quite obvious looking at the last picture. wonder whose gonna fess up and take care of PVT spam? I dont see how any owner missed that one at all....... ummm....I have already told PVT spam that I will make it right by him, regardless of what hit I take. I'm a man of my word. I should have seen it, but didnt. There was no trickery here. I can only hope others....including DPMS step up. I have sent the AR15 DPMS industry rep. a link to this thread, but no reply yet. Regardless, PVT spam, you are covered buddy. |
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Quoted: Quoted: Quoted: Glad to see all parties are stepping up to the plate. I am no expert but it almost looks like it was machined that way. yup, chamber reamer whent TU and totally missed any QC. it is quite obvious looking at the last picture. wonder whose gonna fess up and take care of PVT spam? I dont see how any owner missed that one at all....... ummm....I have already told PVT spam that I will make it right by him, regardless of what hit I take. I'm a man of my word. I should have seen it, but didnt. There was no trickery here. I can only hope others....including DPMS step up. I have sent the AR15 DPMS industry rep. a link to this thread, but no reply yet. Regardless, PVT spam, you are covered buddy. Thanks bud, Let me know when you hear from them and what they have to say about it. |
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Obo2 that looks almost identical to what my chamber looks like. Some update.....As stated above freedom73 offered to replace the barrel since it was sold to me by him. I'm fine with that and I will have someone replace the barrel for me. But who's gonna cover his loss? I'm sure the fault cant be all his, he still haven't heard from DPMS and I'm not sure if his seller has made offer to help me replace the barrel. |
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Obo2 that looks almost identical to what my chamber looks like. Some update.....As stated above freedom73 offered to replace the barrel since it was sold to me by him. I'm fine with that and I will have someone replace the barrel for me. But who's gonna cover his loss? I'm sure the fault cant be all his, he still haven't heard from DPMS and I'm not sure if his seller has made offer to help me replace the barrel. DPMS marked barrel with a bad factory reamed chamber from the start, DPMS will replace it for free. |
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Obo2 that looks almost identical to what my chamber looks like. Some update.....As stated above freedom73 offered to replace the barrel since it was sold to me by him. I'm fine with that and I will have someone replace the barrel for me. But who's gonna cover his loss? I'm sure the fault cant be all his, he still haven't heard from DPMS and I'm not sure if his seller has made offer to help me replace the barrel. DPMS marked barrel with a bad factory reamed chamber from the start, DPMS will replace it for free. |
| I agree, and you don't need to spill all the beans. Call DPMS, tell them that you have a DPMS barrel that is tits up with a bad chamber job and see what they are willing to do. No need to go into all the details of I bought it from A who bought it from B and was assembled by C who used a DPMS barrel. Keep it simple. DPMS has always given me and many others very good CS so you may avoid a whole lot of BS by just calling DPMS first. Anyway that is what I would do. |
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Just got wind of this, looks like the end user got in touch with us and is sending the barrel in for replacement. We stand behind our products and if it left DPMS that way we will fix the issue no questions asked.  Other firearms manufacturers should follow DPMS's lead on customer service and warranty!  GT27
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Just got wind of this, looks like the end user got in touch with us and is sending the barrel in for replacement. We stand behind our products and if it left DPMS that way we will fix the issue no questions asked. Awesome your willing to help this gentleman out. |
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Update My new barrel came in today from DPMS now I can finally get back to shooting my rifle. I didn't expect a new barrel but they sent me a new one. Just wanna say thank you to DPMS for taking care of this, the service is fantastic. thanks to this community for guiding me to the right direction and to the seller for being such a good sport about the whole thing. Thanks again.  |
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