Installing the barrel on my upper

Discussion in 'AR-15 Discussion' started by patrickkr, May 4, 2014.

  1. patrickkr

    patrickkr New Member

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    Hi I recently decided to build my own upper and I have slowly started to get my parts together. Got the stripped upper,the bolt assist, dust cover,gas tube, barrel, hand guard and gas block. I also got some aeroshell 33ms I read it was some really good stuff. My only concern is putting the barrel on my buddy gave me a no-mar upper vice bock and a ncstar armor tool. I know the armor tool has a barrel wrench on it but ncstar makes some cheap stuff sometimes will it work or should I buy a better one or just a barrel wrench without the other stuff on it. I also have the torque wrench.


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  2. SSGN_Doc

    SSGN_Doc Well-Known Member

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    Torque wrench is your friend. Barrel nut should be torqued on to approximately 30 ft/lbs, then backed off. Repeat a couple of times to ensure thread seating. Final torque until a gas tube notch lines up with torque between 30 and 80 ft/lbs.
     

  3. KG7IL

    KG7IL Well-Known Member

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    It will not hurt to try/use the 'cheap' tool. You will quickly find out if it will work for you.

    My guess is that the barrel aperture will be of sufficient quality to work as needed.

    Some of the other features may not work as well as they might on a better quality or design, but it will probably work.
    I find that the buffer tube castle nut can be a bit tricky with my DPMS tool. If you build more, you may end up with a couple of armorers tools/wrenches.

    My builds have been successful with my original DPMS tool; I often find criticism of this design on the forums, but it can work.
    The only reason I haven't upgraded the tool is because it DOES WORK and I'll put my money somewhere else.

    IMPORTANT: if you think the tool is contributing to any damage during assembly, seek more advice from others that have tried different tools.

    I still get annoyed inserting the Mag Release Pin. :( grrrrrrr.......
     
  4. Triumphman

    Triumphman Active Member

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    Go ahead and use that NC Star Wrench. Guaranteed they didn't make it. Only has their name on it. It might work very well.
     
  5. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    What SSGN_Doc said. And also it is recommended to add a few small dabs of Aeroshell 33MS grease on the upper threads and front edge of barrel flange (one that contacts the barrel nut). Good luck with the build, can't wait to see it!
     
  6. fsted2a

    fsted2a Active Member

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    For future reference, I get my AR tools from Brownells. I have a hard rubber vice block I use with the uppers instead of the barrel jaws to avoid any scratches. works nice. My barrel wrench happens to be DPMS. Brownells makes a pin that goes inside the gas key that you can use to line up the barrel nut. It is thicker than the gas tube deliberately so you will have some clearance when you install the gas tube. Another tip: I use a thin white marker (liquid paper works too) on the barrel on the receiver side of where the handguard cap is to mark where the port hole is so I can line up the gas block.
     
  7. Gatoragn

    Gatoragn Active Member

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    I used Loctite brand anti seize compound on the barrel nut of AR I assembled.
     
  8. Gatoragn

    Gatoragn Active Member

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    I bought one of these a few years back:

    http://www.brownells.com/gunsmith-t...s/ar-15-m16-critical-tools-kit-prod41214.aspx
     
  9. fsted2a

    fsted2a Active Member

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  10. patrickkr

    patrickkr New Member

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    Turns out I was right ncstar is junk It stripped out the teeth on the wrench on the first turn to torque it on. I was able to get it to 30lbs but can't get anymore out of it and I'm between slots for the gas tube I'm about 1/8" off. I guess I'm going to take it to a gun shop that's on my way to work and have them finish it. Should have bought better tools to start with and would have been better off I hope they don't charge to much for it.


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    Last edited: May 14, 2014
  11. toddchaney

    toddchaney New Member

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    If you aren't sure about it then why use it. Go for some other alternative.
     
  12. fsted2a

    fsted2a Active Member

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    I normally don't give DPMS any rave reviews but I've had one of their AR wrenches for several years and never had a problem with it. Now if they would just do a better job of QA on their lower price AR's.....
     
  13. patrickkr

    patrickkr New Member

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    ImageUploadedByFirearms Talk1400611755.221226.jpg all done


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  14. toddchaney

    toddchaney New Member

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    I would say that's your personal choice than. Do what you think is best for your AR.