close

Privacy guaranteed - Your email is not shared with anyone.

Colt half-circle bolt carrier question?

Discussion in 'Black Rifle Forum' started by h&kbama, Jan 30, 2010.


  1. h&kbama

    h&kbama
    Expand Collapse

    Joined:
    Jan 28, 2005
    256
    0
    Location:
    SE United States
    I recently acquired a Colt Sporter HBAR AR15 with 20" barrel, standard A2 configuration. When I brought it home, I broke it down to clean it and noticed that the bolt carrier is what I believe is called the half-circle variety. I have never seen one of these b4. Will a standard closed bottom bolt carrier fit in my Colt? Is there any advantage(s)/disadvantage(s) to the one supplied with my rifle as opposed to the closed bottom bolt carriers that I am used to seeing? Any useful information is appreciated. Thanks.
     

    Wanna kill these ads? We can help!
  2. 1811guy

    1811guy
    Expand Collapse
    Formerly1811guy2

    Joined:
    May 1, 2001
    3,531
    1
    They work fine. Colt did that as yet another measure to ensure you cannot convert it to full auto - blocked lower receiver, high shelf, etc. If it really bothers you, just buy an M16 bolt carrier and install your bolt with new gas rings. Functionally, they are as reliable as any other decent milspec bolt.
     

  3. h&kbama

    h&kbama
    Expand Collapse

    Joined:
    Jan 28, 2005
    256
    0
    Location:
    SE United States
    Thanks 1811guy2. If it aint broke, don't fix it. I just had never seen one like it b4. Depnds on how much I shoot my new Colt, I may invest in a hard chrome bolt/bolt carrier group later on. Thx again.
     
  4. 1811guy

    1811guy
    Expand Collapse
    Formerly1811guy2

    Joined:
    May 1, 2001
    3,531
    1
    Your Colt BCG will function perfectly as is. I would save the HC BCG for some other project. You will find your Colt BCG is worth a small fortune and is built as good as they come. Enjoy your Colt, you have one ofthe finest AR15 rifles around, and it needs no upgrades. There will be folks who knock them, but that is only because they do not have one.
     
  5. Alaskapopo

    Alaskapopo
    Expand Collapse
    NRA ENDOWMENT

    Joined:
    Feb 6, 2000
    6,545
    2
    Location:
    Alaska
    You can't run a M16 carrier in a Colt with a sear block. Ask me how I know? You won't be able to put the gun back together as the sear block pushes up into the bottom of the bolt carrier.
    Pat
     
  6. 1811guy

    1811guy
    Expand Collapse
    Formerly1811guy2

    Joined:
    May 1, 2001
    3,531
    1
    You are correct, however, I have a 6520 without a sear block. M16 BC works fine in it. Not all Colt lowers have the sear block installed.
     
  7. Alaskapopo

    Alaskapopo
    Expand Collapse
    NRA ENDOWMENT

    Joined:
    Feb 6, 2000
    6,545
    2
    Location:
    Alaska
    You're correct but most of the Colt Sporters do as is the case with the OP.
    Pat
     
  8. 1811guy

    1811guy
    Expand Collapse
    Formerly1811guy2

    Joined:
    May 1, 2001
    3,531
    1
    Ahso. Fortunately, his Colt BCG is good to go. That thing costs around $400 to replace! I swear, if their rifles weren't so damned good, I would be convinced it was a racket.