AR15 problems please Help

Discussion in 'AR-15 Discussion' started by toxicthrash, Nov 27, 2012.

  1. toxicthrash

    toxicthrash New Member

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    My new AR 15 only shot 60 rounds Winchester.55gr. Was having some extraction isues but resolved problem with new extractor spring kit. And polished my feeding ramp. Now extracts perfecr. But now the problem is the gun wont fire. I loaded 10 rounds of pmc 55 gr. And nothin gun just went click.. I tried my lower reciver ans bolt with charging handle on my friends upper it works perfect so that means its my upper right? Please help me out. I want my gun to fire perfect thanx
    I apologize for the previous edit i didnt realize what i did.
     
    Last edited: Nov 27, 2012
  2. jjfuller1

    jjfuller1 New Member

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    welcome...have you taken it apart yet? if yes, did you put it back together properly? do any of the trigger, hammer springs look busted? or maybe the disconnector is out of spec. have you tried contacting the company for warrenty work?

    pics would be helpful. be sure to swing by the intro page as well to tell us about yourself.
     

  3. kytowboater

    kytowboater Active Member

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    Keep your posts one one thread. In the AR-15 section. We don't need 15 million different threads. Reporting this one for removal.
     
  4. Scorpion

    Scorpion New Member

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    What you have here is a failure to fire malfunction.

    Is there an indentation on the primer?

    Is the lower receiver factory assembled? Look inside it. Are the hammer spring legs on TOP of the trigger pin?

    Is the firing pin too short, or broken? Is the retaining pin holding the firing pin in the firing pin chamber, and is the firing pin chamber clean?

    Go through when you get a chance and check for each of these. Unless I missed something, nothing else in the upper receiver, short of the bolt not closing on the chamber, would cause the rifle not to fire.
     
    Last edited: Nov 27, 2012
  5. okdonk

    okdonk New Member

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    You don't need to post the same thread everywhere. Just one in one category will do.
    Just saying..
     
  6. gunnut07

    gunnut07 New Member

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    Did you remember to put the firing pin back in the bolt carrier after replacing the extractor?
     
  7. Jpyle

    Jpyle New Member

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    I was going to ask that same question...:p
     
  8. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    How about the firing pin retaining pin. If it is in incorrectly it will block the firing pin and cause a FTF situation. That one is easy to do accidentally
     
  9. toxicthrash

    toxicthrash New Member

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    Hey guys just wanted to update you on my AR 15 , and to answer some ? Yes i did remember to put firing pin back in , and i assembled the lower my self., ... I polished the feeding ramp and polished out part of the extractor areas. . I think my issue was that the carrier group wasnt locking into place. I had a friend take a look at it and he fixed the issue.now Im going to try it out on Saturday to see if it fires. Wish me luck..

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  10. Scorpion

    Scorpion New Member

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    How did he fix the issue?

    Your lower receiver assembly is good.

    Go test the rifle first to be sure. Make sure you have plenty of lubricant on the bolt carrier group.

    EDIT: I just noticed you have a carbine lower and a 20-inch upper. That might cause an issue.

    The carbine's action spring is stronger than that of a rifle action spring, and the closest buffer (that little rattling thing in the receiver extension (buffer tube)) to a rifle buffer is an H2 buffer. You might need to change out some parts to get that rifle functioning normally.
     
    Last edited: Nov 29, 2012
  11. Quentin

    Quentin New Member

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    Polished the feed ramps... Can you describe this better, how much polishing?

    The reason I ask is from the first to second BCG pictures it looks like you rounded off the bolt lugs. I wouldn't have done that. We can't see the other side of the lugs but if you really went to town on that side you may have messed up the headspacing.

    I notice that your barrel has M4 feed ramps but the receiver doesn't. That's ok but not ideal. Probably won't matter in a 20" barrel though.
     
  12. toxicthrash

    toxicthrash New Member

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    I check my headspace with the gage and it was with in spec. Polished out with polishing compound and a dremol tool. The bcg had some work done. There was some machine burrs that were obstructing the bcg from locking properly. Ill let u know hoe it shoots . Ill take it out for a test tomorrow. Thanx for ur advise
     
  13. toxicthrash

    toxicthrash New Member

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    AR 15 uppdate,. It was a No go.. FTF again. Dam it gets me,so frustrated. Now im sure there is an issue,with the,upper. Im going to send it back to the manufacture for proper repair. I made a small video at the range to show,uou guys. It fired once in the video but the second one was a ftf. The range master couldn't figure out the issue. He mentioned that i need a new extractor. Due to failure to eject. But he didn't know why it FTF. Well check out the video . Thanx for,your,help

    https://www.youtube.com/watch?v=psMnMGMrS10&feature=youtube_gdata_player
     
  14. Scorpion

    Scorpion New Member

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    So you have primer indentations, but it isn't firing.

    What kind of ammo are you shooting?

    Try a different bolt carrier group or try another firing pin in that bolt group.

    Try a different lower receiver (one with a full rifle stock). The action spring could be sending the bolt forward with such force that it is causing the bolt to bounce back slightly upon locking, which could cause a failure to fire. This typically doesn't happen in semi-automatic rifles, but it's not impossible.
     
    Last edited: Dec 1, 2012
  15. Jpyle

    Jpyle New Member

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    Be prepared for the possibility that the manufacturer is going to charge you for the repairs if they detect that you took a dremil to the feed ramps, especially if you polished them out of spec or damaged the lugs in any way. Same thing for the bolt...
     
  16. toxicthrash

    toxicthrash New Member

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    Scorpion, i was shooting Winchester 45 gr, 556 ammo.

    I had tried my friends bcg and lower with my upper last week and it did the same thing. , i tried my lower and bcg on his upper and it worked perfectly. I understand what u mean about the stock. That is not the original stock it came with. I switched it.
    And,i understand the manufacure might charge me. . But i need my gun running smooth. I did a light polish not removing or grinding down any metal pieces . For the ramp, thank u guys anyway ill see what the manufacture says.
    I understand due to the high rate of AR sales and the so many back orders they seem to just be slaping theye guns together and not taking a close look at the inspections . Well we will se whats up.. Thanx again
     
  17. Scorpion

    Scorpion New Member

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    What kind of stock did you have on the rifle at first?

    It is now established that it most likely isn't your BCG causing the issue. I'm thinking you just need to put a full rifle stock (or an A5 stock) on there, or switch your buffer to an H2 buffer to slow down the cyclic rate so the bolt won't slam into the barrel extension so hard.

    Just my opinion. It's difficult to diagnose issues over the internet. Good luck with getting it fixed.
     
  18. toxicthrash

    toxicthrash New Member

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    Hey scorpion just to give u an update. my old stock was a A2 style stock. my current one is a collapsible ajustable stock from amazon it was about $40. . Ultimate arms gear tactical. I think.. I will buy the H2 buffer this week. Will get the spikes tactical. Or any recommendation? Should i get a new buffer spring too. And if yes what type of spring do i get for that stock? What legth spring should i get .
    Im going to hold off on sending it back untill i try this new h2 buffer. Hopefully ill test it this week as soon as the buffer gets here
    I never knew there can be so many complications for a AR 15 but im learning a great deal im sure for my next build there will be no issues

    I have a 20 in upper . Now i remember when i switched my lower and bcg on his upper it fired. I think its because his is 16 upper not a 20inch
    Thanx again scorpion ill keep u posted
     
  19. Scorpion

    Scorpion New Member

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    I figured as much, and I'm almost certain that the buffer currently in yours is a regular carbine buffer.

    It can be a little complicated to get a 20" barreled upper working with a carbine lower. Make SURE the buffer is an H2 buffer and not an ST-T2 buffer; I don't know the reciprocal weight for the ST-T2 buffer and am not sure if that would work with your rifle as it is configured.

    The H2 buffer has the same reciprocal weight as your old rifle buffer and would slow the cyclic rate down a bit, perhaps enough to permit proper function.

    You should already have a carbine spring in there; that is the only spring that will fit in the stock.
     
    Last edited: Dec 4, 2012
  20. toxicthrash

    toxicthrash New Member

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    Going to buy a new upper with bcg any recommendations ? I dont want to spend more than 500