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Thread: BCM Prototype upper?

  1. #201
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    Quote Originally Posted by naturerancher View Post
    Thanks for the post.

    I was planning to wait on the BCM MK2 to come back in stock and mount a LaRue LAT handguard to it.

    I may just use the BCM blem lower I have but it’s in between the barrel nut holes when torqued and I’m not sure how hard I want to push it.

    If I end up getting the MK2 and modifying, I’ll post the results.
    Can you shim the barrel nut with, say, an ALG shim to align it within the torque range?

    Andy

  2. #202
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    Yes...did that on a recent build when closest hole was <minimum torque value, next hole up was close to maximum. I like to stay on the lower end of the barrel nut torque range, so used a shim and all is good.


    -Rainman

  3. #203
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    Just showed up in the mail. FA position is brilliant, and the receiver opposite the port door is absolutely THICC.




  4. #204
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    Quote Originally Posted by Outlander Systems View Post
    Just showed up in the mail. FA position is brilliant, and the receiver opposite the port door is absolutely THICC.
    Mine didn't have the BCM logo on the side. I'll bet yours cures cancer.

    What did you use on the port cover rod instead of the circlip?

    I still haven't made up my mind about the greatness of the FA location. I'm a lefty so you'd think standard locations would really give me a snoutful of gas, but they have never really bothered me, maybe because I generally shoot .223 vs. 5.56 suppressed, or unsurpressed for that matter. I haven't run any FTF drills yet, so unsure if it really makes a difference for left-handed operation.

    I'm not regretting my purchase, by any means, I used it for a new 13.7 pin and weld. I'll probably take that barrel off on down the road and use the upper with an 18 or 20 inch barrel of known precision off another upper to see if it really makes a difference.
    Last edited by 26 Inf; 01-07-20 at 19:12.
    Patriotism means to stand by the country. It does not mean to stand by the President... - Theodore Roosevelt, Lincoln and Free Speech, Metropolitan Magazine, Volume 47, Number 6, May 1918.

    Every Communist must grasp the truth. Political power grows out of the barrel of a gun. Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party Mao Zedong, 6 November, 1938 - speech to the Communist Patry of China's sixth Central Committee

  5. #205
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    Attached Images Attached Images
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


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  6. #206
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    Quote Originally Posted by 26 Inf View Post
    Mine didn't have the BCM logo on the side. I'll bet yours cures cancer.

    What did you use on the port cover rod instead of the circlip?

    I still haven't made up my mind about the greatness of the FA location. I'm a lefty so you'd think standard locations would really give me a snoutful of gas, but they have never really bothered me, maybe because I generally shoot .223 vs. 5.56 suppressed, or unsurpressed for that matter. I haven't run any FTF drills yet, so unsure if it really makes a difference for left-handed operation.

    I'm not regretting my purchase, by any means, I used it for a new 13.7 pin and weld. I'll probably take that barrel off on down the road and use the upper with an 18 or 20 inch barrel of known precision off another upper to see if it really makes a difference.
    I was under the impression that the logo isn't there on stripped uppers, just complete ones.
    Sic semper tyrannis.

  7. #207
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    Mine was a complete upper. I thought the logos were only for complete uppers as well.

    Quote Originally Posted by Wake27 View Post
    I was under the impression that the logo isn't there on stripped uppers, just complete ones.

  8. #208
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    Quote Originally Posted by Wake27 View Post
    I was under the impression that the logo isn't there on stripped uppers, just complete ones.
    That seems logical. Wasn't aware.
    Last edited by 26 Inf; 01-08-20 at 02:39.
    Patriotism means to stand by the country. It does not mean to stand by the President... - Theodore Roosevelt, Lincoln and Free Speech, Metropolitan Magazine, Volume 47, Number 6, May 1918.

    Every Communist must grasp the truth. Political power grows out of the barrel of a gun. Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party Mao Zedong, 6 November, 1938 - speech to the Communist Patry of China's sixth Central Committee

  9. #209
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    Quote Originally Posted by Wake27 View Post
    I was under the impression that the logo isn't there on stripped uppers, just complete ones.
    That is my understanding as well, with it being done to show what is and what isn't a factory build.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  10. #210
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    Quote Originally Posted by AndyLate View Post
    Can you shim the barrel nut with, say, an ALG shim to align it within the torque range?

    Andy
    Yup. Probably could use some KAC shims I have.

    Got it to line up at 75-80 pounds without shimming. Felt awfully tight.

    I don't like how far my rear sight has to be cranked to zero, so maybe there’s something slightly out of square somewhere.

    I’ll wait for th Mk2 to come back in stock and probably rebuild on that upper for giggles.
    Last edited by naturerancher; 01-09-20 at 01:33.

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