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Thread: Extractor/Jamming issues

  1. #11
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    Quote Originally Posted by Quentin View Post
    That's what I've heard too about Rguns. And very poor CS, i.e. guns that took six months to be returned after repairs.




    JusticeM4, this would be a good thing to try, especially before chancing sending your gun back to Rguns! My Daniel Defense upper very rarely would fail to extract but it was a big problem when it happened. I replaced the extractor with the BCM kit and haven't experienced the issue since. I suppose you could also try the Crane O-ring, though I don't myself.
    Thank you for all the advice.

    Btw i'm using 223Factory brass (Remington and American Eagle). it is marked 5.56 on the barrel.

    I went to the range again today and it fires ok in the beginning, but around 80rds it starts to jam. Granted I haven't cleaned it since the 2nd range visit, it is generously lubed. Could be just a bit dirty in the chamber. I am still using my roomate's Spikes BCG.

    A Spikes upgraded extractor spring is on order. hopefully this will solve the issue. I have not heard too much about Rguns, but i hope this is the only issue i encounter with this upper.

  2. #12
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    Quote Originally Posted by JusticeM4 View Post
    .....it fails to extract the empty cartridge with another round trying to load......
    Failing to extract or failing to eject?

  3. #13
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    Barrel markings mean nothing unless it is from one of the major companies. Many of the lessor ones have been known to mark barrels 5.56 and the chambers were not.

    What is "jam"? Not being facetious but jam is something you put on toast. If you want to diagnose the issue then you need to be able to articulate what the issue is.

    Are you experiencing a failure to extract or a failure to eject? Is there an expended round in the chamber with a live round feeding into it?

    This is what we need to know. As I stated before this sounds like classic tight chamber syndrome. 80 rounds is nothing. I have run 10 times that in my weapon without cleaning in a single day.

    At the end of the day you can play with extractors, O-rings, buffers and springs and all you are doing is more than likely putting a band-aid on it.

    Quote Originally Posted by JusticeM4 View Post
    Thank you for all the advice.

    Btw i'm using 223Factory brass (Remington and American Eagle). it is marked 5.56 on the barrel.

    I went to the range again today and it fires ok in the beginning, but around 80rds it starts to jam. Granted I haven't cleaned it since the 2nd range visit, it is generously lubed. Could be just a bit dirty in the chamber. I am still using my roomate's Spikes BCG.

    A Spikes upgraded extractor spring is on order. hopefully this will solve the issue. I have not heard too much about Rguns, but i hope this is the only issue i encounter with this upper.



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  4. #14
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    like all the above mentioned; R-guns is a no go. always number every mag you own. no reason for a detailed strip and cleaning after 3.5 mags unless you have an issue. either find a local smith to run a finishing reamer in your chamber or invest in a new barrel. an easy way to rule out your extractor is to swap complete bolt carrier groups with a friend for a range session.

  5. #15
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    Quote Originally Posted by JusticeM4 View Post
    Hello guys, need your help with some jamming issues on my AR15. It is a 16in Carbine with Spikes lower and Rguns upper.

    My first range trip a month ago was fine, shot about 100rds to test it out and no issues. 2nd and 3rd range trip (today) I've had some issues with not ejecting the empty cartridges.

    On my 2nd trip apparently the spring on the extractor fell out (dunno how); I always field strip and clean down to the extractor after each range session. So on that range trip it would not extract the empty cartridge after every shot. RO helped me figure this out so a extractor is on order.

    Today (3rd range visit) I went to the range and borrowed my roomate's BCG (Spikes) to use on my AR because I want to sight in my new scope. First mag shoots without any problems, shooting 1rd every 2seconds. The second mag I do a bit of rapid fire and around 25rds it fails to extract the empty cartridge with another round trying to load.

    What could be the issue? I am using P-mags and my friend's Bolt carrier group, and the rifle is lubed. Thanks in advance!
    As some have stated, tight chamber or bad extractor/spring or both. Get a new extractor, which you are already in the process of getting, a five coil extractor spring, with black insert, and do not use the doughnut...it's too much tension, which will leave you with again, a stuck case.

    Quote Originally Posted by Univibe View Post
    Magazines won't cause failure to extract.

    1. What kind of ammo are you using? Steel case sometimes causes problems in some guns. Lacquered ones can glue up your chamber
    That statement is as wrong as two boys ****in. Please stop with the internet myth/Hearsay/Bullshit. Try and use a blow torch to see if you can melt the lacquer off and report back. The ones that I have seen were due to a worn extractor, or using the doughnut + insert + a 4 coil extractor spring, or a POS gun with a tight chamber. Myself and several others have proven this myth wrong over and over and over again....It does not "melt", causing these types of failures. The closes theory is that in some instances, an uneven application of the lacquer on the case, which produces a "drip" of hardened lacquer, will cause the case dimension to be slightly increased/deformed and wedged into the chamber during the firing sequence, that "may" cause a stuck case. And that, is the best theory going, and it's still only a theory. After personally shooting over 15K of lacquered Wolf, Tiger and Brown Bear, many times in carbine courses, and in regular range sessions, through 4 ARs, I have not had one issue with that ammo, running my ARs up to 4K rounds a couple of years ago to vet my ARs, without cleaning, just lube.
    For God and the soldier we adore, In time of danger, not before! The danger passed, and all things righted, God is forgotten and the soldier slighted." - Rudyard Kipling

  6. #16
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    From the description I'm still not sure if we're actually talking about extraction or ejection. OP, just to be sure...

    Extraction is the act of extracting the empty case from the chamber as the bolt moves to the rear.
    Ejection is the act of flinging the empty case free from the carbine through the ejection port.

    So what you're describing is the bolt moves to the rear and picks up the next round from the magazine but does not extract the empty case from the chamber, correct? When you clear it (lock bolt to rear, magazine out, rack charging handle 3x) does the empty case then extract and eject? My guess would be that the loaded round, the one that is trying to chamber into the base of the empty case, either falls free or sticks up vertically from the magazine when you remove it?


    My suggestion

    http://www.brownells.com/.aspx/pid=4...PRING-ASSEMBLY
    and
    http://www.brownells.com/.aspx/pid=4...duct/EXTRACTOR

    or

    http://clydearmory.com/colt-ar6720.html
    Last edited by rob_s; 02-15-12 at 07:59.

  7. #17
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    Substandard parts = substandard performance.

    Not all AR parts are equal in quality and precious few companies know how to assemble ARs correctly. It isn't rocket science, but so many screw it up or flat out refuse to do it correctly.
    If I were you I'd return the upper to R-Guns for refund and buy a BCM, LMT, Daniel Defense, S&W or Colt upper assembly.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  8. #18
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    Let me clarify: it is not ejecting the spent case. It gets stuck at the ejection port and the following round is trying to load. Sorry about that.

    Again, this is a used AR that was built by the seller. I've never heard of Rguns before buying this rifle, but at least it comes with a Spikes lower with T2 buffer.

    I'm in the process of building a 300Blackout with quality parts (CMMG, DD, etc). This current rifle is only a plinking/range rifle so its not such a big deal that it isn't top tier. My last Bushmaster M4 worked much better than this and had no failures after a few hundred rounds.
    Last edited by JusticeM4; 02-15-12 at 14:36.

  9. #19
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    Now I'm confused.

    Quote Originally Posted by JusticeM4 View Post
    Let me clarify: it is not ejecting the spent case. It gets stuck at the ejection port and the following round is trying to load. Sorry about that.
    Does it look like picture number 1 or picture number 2?

    Picture number 1



    Picture number 2

    Last edited by Eric D.; 02-15-12 at 15:49.
    B.A.S. Mechanical Engineering Technology

  10. #20
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    Or picture number three? Which I don't have one but if I did it would show an empty case stuck in the bolt face, under the extractor with the mouth of the case jammed into the back of the barrel extension and a new cartridge being stripped from the magazine trying to occupy the same space as the fired case.

    To put it differently, is the fired case stovepiped out of the ejection port as Infidel shows in his first photo or is the fired case still completely inside the receiver, parallel with the new cartridge?
    Last edited by Suwannee Tim; 02-15-12 at 16:29.

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