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Thread: Questions about DDM4V7

  1. #51
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    Quote Originally Posted by masteroc View Post
    Both the aluminum mag and the Tapco were brand new.

    I'd like to reiterate, that I do believe that Pmags are of superior quality to the Tapco and the aluminum mag.

    The reason I am a bit uncomfortable with the jams in my DD is the fact that these are new mags that work in other ARs. Again, so I don't get more of the same, they are probably not the best mags in the world...I get this. Someone made a car analogy, ill stick with this: Do I plan to put 89 octane fuel in a BMW....no, do I expect it work with 89 octane fuel if the need arises...yes. To get straight to the point. I expect my upper quality gun to work with anything I throw at it. You can't tell me that top tier AR manufacturers who (im assuming) have military use in mind, expect soldiers to turn their nose up at anything but Pmags.

    Also, why all the hate for gun smiths?
    I have a M4V3 I had some feeding problems with the first mag or two. Provided I was shooting Tula which was underpowered at best. But after a couple of mags, no more issues and went bang every time. And these were random ex GI mags with green followers that had seen better days. But next three mags, no problems whatsoever.

    Have you tried cleaning the mags? Even though "new" sometimes they can get just dirty enough to cause a malfunction. Try cleaning under the feed lips and seeing if there are any burrs that might be catching that top round.

    And oil that rifle up. From your photos, that bolt is looking a little dry. Break down the entire rifle, clean dry to get the factory packing oil off, re-lube with decent lube of choice and press forward.

  2. #52
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    On the gunsmith discussion, I would send it to DD before handing it over to a gunsmith. In my experience, gunsmiths may specialize. I have one gunsmith who is great with shotguns and bolt guns. There is not a better one within 100 miles. But, he knows very little about AR's or 1911's. The guy who is best with AR's is a very good armorer but not a gunsmith. The LGS gunsmith is a Glock armorer and may not know as much about AR's as I've learned on this site. But, he is willing to learn on both of my DD's if I'll let him. I'm just saying you might want to be certain he knows something about AR's before you hand it to him.
    The best advice I got here when I got my first DD was "lube, shoot, repeat".
    Eric

  3. #53
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    Quote Originally Posted by masteroc View Post
    Both the aluminum mag and the Tapco were brand new.

    I'd like to reiterate, that I do believe that Pmags are of superior quality to the Tapco and the aluminum mag.

    The reason I am a bit uncomfortable with the jams in my DD is the fact that these are new mags that work in other ARs. Again, so I don't get more of the same, they are probably not the best mags in the world...I get this. Someone made a car analogy, ill stick with this: Do I plan to put 89 octane fuel in a BMW....no, do I expect it work with 89 octane fuel if the need arises...yes. To get straight to the point. I expect my upper quality gun to work with anything I throw at it. You can't tell me that top tier AR manufacturers who (im assuming) have military use in mind, expect soldiers to turn their nose up at anything but Pmags.

    Also, why all the hate for gun smiths?
    I would like to reiterate; There are quality AL mags as mentioned by others as well as PMAGS, TangoDown, and few others. TAPCO is NOT one of them. The TAPCO FAILED on your CORE15 as well. So WHY would you think it is still an ok mag and state that it only fails in the DD?? It failed in BOTH. The al mag may have worked one time for 20 rounds in the CORE15, but you might want to put 100 before calling it a GOOD mag. The analogy of the car never mentioned fuel, because fuel would be the ammo, and because you had jams on BOTH weapons, it is more related to a mag issue as well as the pictured and described jam that you are experiencing is a common MAG failure. Hence the Tires analogy. Oil analogy was for lubrication which can cause jamming issues as well. And 89 octane may "work" in a BMW, but it will cause valve pinging and possible valve failure which is why it is not recommended to run it.

  4. #54
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    Daniels ships their guns with a heavy Extractor spring and a "O ring" around it.
    Try removing the O ring. Then run some M193 or M855 through it.
    I'm thinking 3 things. Too much Extractor tension ( I have seen bolts with brass smears on the front of them with the O ring).
    Low power ammo ( This is a miltary spec gun. it's set up for the hot stuff).
    Or last Bad mags. P mags are good, but they can have issues. Regular D&H or NHMTG mags are simple, but work.

  5. #55
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    I bought a Springfield Armory Stainless loaded with a very low round count a couple of years ago.
    I got it for a great price because the original owner was honest and told me that the gun would always jam on him.
    It was his only .45 and it would jam with both the original mags.

    I bought the pistol and had the same issues with my reloads.
    I borrowed a few Wilson Combat mags for a day and put 500 rounds through the gun without a single hiccup.
    I ordered 4 Wilson mags the very same day.
    I have since run over 5,000 rounds through the gun and have never had a mag induced failure since.

    I could have screwed around with the gun a million different ways trying to get the original mags to work but I just went with something that is known to work.

    There is no substitute for putting rounds downrange to check for reliability issues.
    At the same time if your life is depending on this rifle working more practice means better proficiency

    Run the gun wet, get some 5.56, and get another Pmag. If you have no more problems you're good to go.
    Last edited by Thump_rrr; 02-17-13 at 09:09.

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