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Thread: Question about multiple uppers for the same lower

  1. #11
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    Quote Originally Posted by GH41 View Post
    Everything a MD does it does after the projectile leaves the barrel.
    True that, but from their write-up I was scratching my head if the expelled gases are being held in the FH and acting upon the recoil impulse.

    Maybe it's my reading comprehension. I looked at it as having maybe some characteristics of, for example, the can-shaped "booster" FH on a Krinkov or something.

    I may have been reading it wrong. They may not be implying anything of the kind.

  2. #12
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    Build a lower with a Vltor A5H2 set up, and you can pretty much run the field. At least in my limited AR experience.



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  3. #13
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    Quote Originally Posted by Iraqgunz View Post
    Build a lower with a Vltor A5H2 set up, and you can pretty much run the field. At least in my limited AR experience.
    Word up.

  4. #14
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    I tried the one lower and multiple uppers thing years ago. All my uppers grew lowers and then produced more stripped lowers which then matured into rifles.

    **** lead farming, I'm a gun farmer.
    "I don't collect guns anymore, I stockpile weapons for ****ing war." Chuck P.

    "Some days you eat the bacon, and other days the bacon eats you." SeriousStudent

    "Don't complain when after killing scores of women and children in a mall, a group of well armed men who train to shoot people like you in the face show up to say hello." WillBrink

  5. #15
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    Quote Originally Posted by Kain View Post
    I tried the one lower and multiple uppers thing years ago. All my uppers grew lowers and then produced more stripped lowers which then matured into rifles.

    **** lead farming, I'm a gun farmer.
    Exactly. That crap never works for long.

  6. #16
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    Quote Originally Posted by Iraqgunz View Post
    Build a lower with a Vltor A5H2 set up, and you can pretty much run the field.
    My 20" rifle has an A5H2 R.E./buffer and a G2S trigger. I have really been tempted to build a light weight 16" middy upper so I can switch configurations and still enjoy the nice lower.

    Andy

  7. #17
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    I had problems with VLTOR MUR's not taking non-USGI magazines (which still required gorilla strength to seat) on a closed bolt when mated to any of my Mega lowers. No such problem existed using that upper on a shitty R-Guns lower, or my buddy's BCM or DD lower. The problem resolved when I switched over to standard Mega forged uppers.

    All of my lowers are built with A5 systems and usually run A5H3's, but I shoot my short uppers almost exclusively.

  8. #18
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    Not really sure what the upper would have to do with it, unless it was grossly out of spec. I have several MUR uppers and have built dozens of uppers with MUR's with no issues at all. My oldest MUR is probably 7 years old.


    Quote Originally Posted by Zim View Post
    I had problems with VLTOR MUR's not taking non-USGI magazines (which still required gorilla strength to seat) on a closed bolt when mated to any of my Mega lowers. No such problem existed using that upper on a shitty R-Guns lower, or my buddy's BCM or DD lower. The problem resolved when I switched over to standard Mega forged uppers.

    All of my lowers are built with A5 systems and usually run A5H3's, but I shoot my short uppers almost exclusively.



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  9. #19
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    My issue is I just flat out can't decide on ONE optic or sight system. I like using irons, Aimpoints, ACOG's, and I've even considered getting a Meprolight just because.

    I decided after a fashion that instead of putting wear and tear on the rails and optic mounts by constantly mounting and dismounting things that I would keep each upper dedicated to its own sight system and simply swap out uppers depending on which one I wanted to take to the range.

    I can certainly appreciate that uppers can grow into complete rifles, but when you intend to spend a good chunk of money on optics you get to where you want to save funds somewhere.

  10. #20
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    @Iraqgunz I have no earthly clue why it was that way, but it was a problem that only existed between my MUR's and three Mega Gator forged lowers. The uppers all had Noveske barrels and LMT Enhanced Carriers with Noveske bolts. Lowers were built with BAD-ASS, BAD-EPS, Geissele triggers, White Oak bolt catch and mag release from ADCO. I swapped the BCG's out for standard LMT and BCM, tried QMS and regular mil-spec triggers, mil-spec safety, and mil-spec takedown pins. Nothing helped. As far as I could tell, the tolerance stacking was just tight enough between upper and lower to cause that specific problem.

    Like I said, they all work perfectly with standard Mega Forged Uppers now. It still bugs me, and I'd really like to know if you have some insight. I still have the two MUR's in my parts box if there are any measurements that might shed some light.

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