Colt AR Match HBAR question

Discussion in 'AR Talk' started by tweedman, Mar 12, 2011.

  1. tweedman

    tweedman XDTalk Newbie

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    Just picked up a used Colt Match HBAR rifle. The lower says 223. But the barrel markings between the front sight and the brake are: C MP 5.56 NATO 1/7 HBAR. I understand the C is for Colt and MP is Mueller Brass.

    So my question is: Do I have a mismatched upper? Caliber goes by the barrel markings, right? Any idea what I've got?

     
  2. mvician

    mvician XDTalk 5K Member Founding Member

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    The MP is for magnipartical tested.
    5.56 is the chamber on the barrel,
    for whatever reason Colt marks the civilian lowers
    as .223
     
  3. tweedman

    tweedman XDTalk Newbie

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    So this is normal. It is a match barrel and it's ok to run 5.56 Nato ammo through this puppy?
     
  4. treehugger49

    treehugger49 XDTalk 1K Member

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    Absolutely. You may run either .223 or 5.56 through any barrel marked 5.56.
     
  5. Mercmar

    Mercmar XDTalk 5K Member

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    Hmmmmm. 5.56 marked on barrel. Hmmmmm. That's a toughie! :cool: Of course, you can use 5.56 ammo in a 5.56 barrel. You could mark "12 gauge Magnum" on the lower, and it wouldn't make any difference as to what you could fire through the barrel.
     
  6. tweedman

    tweedman XDTalk Newbie

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    Thanks for the replies guys. I'm good with the caliber designation.

    But I'm still confused if this is the upper that originally came with this AR and if it's a match target barrel. Any more stabs at this?
     
  7. mvician

    mvician XDTalk 5K Member Founding Member

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    Pics of the rollmark on the lower and of the complete rifle would help.

    Or google Colt Match Target HBAR or Colt MT 6601 and compare pictures
     
  8. tweedman

    tweedman XDTalk Newbie

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    After deep digging through Google, I believe the upper is stock correct. Here are some images of a very close serial# AR with identical markings.

    Still confused though. Looks like the chambering is in 5.56 NATO. But wouldn't a Match Target gun be more accurate in 223? Unless you are specifically using 5.56? But why is the lower marked differently than the barrel? One of Colt's quirks?

    Thanks Guys! I appeciate the help on this.
     

    Attached Files:

  9. mvician

    mvician XDTalk 5K Member Founding Member

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    Stop over thinking it already :lol:

    Colt marks their LE and .mil lowers with 5.56
    They mark the "Match Target" and other civie lowers as .223
     
  10. tweedman

    tweedman XDTalk Newbie

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    ok,ok,ok! ;)
     
  11. SeaDog0824

    SeaDog0824 XDTalk Newbie

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    I had the same question... thank goodness the forum had the answer. My understanding is that I can shoot 223 out of a 5.56 stamped barrel, but NOT the other way around...the "throat" distances are different: the 223 is almost have as short as the throat distance on the 5.56. The photos that were attached by another user match the markings on my HBAR to a T. I'm glad I did a little research. :D
     
  12. misfit-x

    misfit-x XDTalk 1K Member

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    When in doubt call Colt! I'm sure if you give them the serial number they can look it up and give you all the info you need for the price of a phone call.
     
  13. Devin.Morris.007

    Devin.Morris.007 XDTalk 2K Member

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    I never really paid attention, but mine is like that too. I have a Match Target Competition HBAR II. My lower is stamped for .223 with a barrel on the upper for 5.56 as well.

    Like they said, it doesn't really matter what is stamped on the lower, its just what is stamped on the barrel. My barrel is actually stamped for both 5.56 and .223. If it wasn't, then what SeaDog said is true. You can shoot 223 out of a 5.56 barrel but not the other way around. The thing about the throat distances might be true, but it was my understanding that it had to do with cartridge pressure and barrel rifling. Someone please correct me if I'm wrong.
     
  14. MikeyLikesCarbonFiber

    MikeyLikesCarbonFiber XDTalk 1K Member

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    My lower isn't stamped with a caliber but my barrel is stamped 5.56

    [​IMG]
    [​IMG]

    When I bought my Colt from my LGS, they told me that mine is some special version or something like that. It also came with a factory installed Rogers Super-Stoc
    http://www.holsterops.com/rogers-super-stoc
     
  15. birddog

    birddog XDTalk Member

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    My colt match target competition HBAR is marked lower .223 and barrel c mp 5.56 nato 1/9

     

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