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Thread: Modifying 6920 upper

  1. #1
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    Modifying 6920 upper

    I have a question as far as this goes as well, better to ask in here than start a new post... I was a fairly competent mechanic before I became an EMT assuming I can stumble across all the barrel nut torque specs and I already bought a vice block dpms multi tool front site base block
    how difficult of a change over would it be to put a 15'' nsr on this thing I have a 6920 as well? Is it simply as easy as punching out the gas pin front sire post pins removing the barrel nut, taking my barrel to adco (local to me ) have them pin the low pro gas block. I feel confident up to this point for sure... But re-installation is where I hear problems come in from head spacing... Is this something that can be done with out the proper feeler guages with the factory barrel easily?
    NREMT-B
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    Originally Posted by SteyrAUG View Post
    F*CK MEXICO. Come get your illegals and drug smugglers. Maybe Mexico should register f*cking Mexicans.

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    If ADCO was that close I'd have them do all of it.

    If ADCO was that close I'd prolly be broke!

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    Spent my fair share there, I bought My Kriss Vector there and other misc things there, Probably going to be alot of money spent there soon as I Want to build a .300 sbr
    NREMT-B
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    Originally Posted by SteyrAUG View Post
    F*CK MEXICO. Come get your illegals and drug smugglers. Maybe Mexico should register f*cking Mexicans.

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    I recommend that if you insist on modifying it, that you should have the FSB removed to install the NSR and then cut and grind the FSB and use it as a gas block.

    I would personally not want to use the NSR w/o the anti-rotation feature, but that's simply a personal preference.



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    Quote Originally Posted by Iraqgunz View Post
    I recommend that if you insist on modifying it, that you should have the FSB removed to install the NSR and then cut and grind the FSB and use it as a gas block.

    I would personally not want to use the NSR w/o the anti-rotation feature, but that's simply a personal preference.

    The bar does not have anything to stop rotation on it ?
    NREMT-B
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    Originally Posted by SteyrAUG View Post
    F*CK MEXICO. Come get your illegals and drug smugglers. Maybe Mexico should register f*cking Mexicans.

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    The NSR or "Not a Serious Rail" as I call it does not have any anti rotational feature.

    In fact... if you have the nut a few degrees off of perfect TDC... you can time the rail before final torque on the screws.

    I have no idea why people are pissing themselves over this thing.
    "You people have too much time on your hands." - scottryan

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    Re: Modifying 6920 upper

    Quote Originally Posted by markm View Post
    The NSR or "Not a Serious Rail" as I call it does not have any anti rotational feature.
    Incorrect.

    It just requires a Noveske MUR, Rainier Billet Match upper, or a drill.
    "I never learned from a man who agreed with me." Robert A. Heinlein

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    damn everyone I have talked to pretty much told me this was the rail I had to get I just spend $325 on it, what rail would you guys recommend I am looking for a 15'' rail that does not weigh as much as a cinder block and i guess one that has a anti rotation feature?
    NREMT-B
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    Originally Posted by SteyrAUG View Post
    F*CK MEXICO. Come get your illegals and drug smugglers. Maybe Mexico should register f*cking Mexicans.

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    Quote Originally Posted by hillerika View Post
    damn everyone I have talked to pretty much told me this was the rail I had to get I just spend $325 on it, what rail would you guys recommend I am looking for a 15'' rail that does not weigh as much as a cinder block and i guess one that has a anti rotation feature?
    Check out the Giessele SMR or knights URX3.1. There's a bunch of free float rails out there. Pretty tough to find right now though. Also you didn't waste your money on the NSR. If you decide you want a different hand guard you can easily get all your money back on the NSR.

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    Quote Originally Posted by TheAxeShooter View Post
    Check out the Giessele SMR or knights URX3.1. There's a bunch of free float rails out there. Pretty tough to find right now though. Also you didn't waste your money on the NSR. If you decide you want a different hand guard you can easily get all your money back on the NSR.
    I just took a look at the URX 3.1 and I am liking that one a lot price is less that what I spent too I m just going to have to keep an eye out for one
    NREMT-B
    OHIO EMT-B
    Originally Posted by SteyrAUG View Post
    F*CK MEXICO. Come get your illegals and drug smugglers. Maybe Mexico should register f*cking Mexicans.

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