+ Reply to Thread
Results 1 to 8 of 8
  1. #1
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0

    Guide to assorted AR15 Bolt Carrier Groups

    THIS GUIDE IS IN DRAFT FORM AND IS CURRENTLY AWAITING ADDITIONAL INFORMATION, BLOCKS AND PICTURES WILL BE FILLED IN AS NEW INFORMATION IS GAINED, AND AS TIME ALLOWS. MANUFACTURERS SHOULD FEEL FREE TO EMAIL OR IM ME WITH MISSING DETAILS. THIS GUIDE WILL CONTAIN EMPTY BLANKS UNLESS THE INFORMATION IS GATHERED DIRECTLY FROM THE MANUFACTURER. BOLT CARRIER GROUPS THAT ARE NOT INCLUDED WILL BE INSERTED AS SOON AS THEY ARE MADE AVAILABLE



    Guide to assorted AR15 Bolt Carrier Groups

    Weapon System: AR15/ M16


    Manufacturers:

    Lewis Machine and Tool

    CMT/ Stag

    Rock River Arms

    Olympic Arms

    Young MFG

    Colt





    Purpose of Item: The Bolt Carrier Group (BCG) is the heart of the weapon. The Carrier houses the Bolt, and bleeds off the gas which drives the weapon. The bolt locks and unlocks the cartridge into place within the barrel. While much attention is paid to the bolt, this Guide should give an overview of the entire BCG.


    Tools Needed:

    None needed for assembly or disassembly.


    Items Included:

    A Bolt Carrier Group usually comes as a complete unit. There are sometimes options or upgrades available such as coatings, extractor inserts, or heavier staking. These options are most often through a dealer, and not through the manufacturer.
    Last edited by Stickman; 19 March 2008 at 21:55.

  2. #2
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    Young Mfg National Match Chrome Bolt Carrier Group

    The Young MFG BCG is available in the below pictured M16, or AR15 version. Both the Bolt and Bolt Carrier are fully chrome plated. The National Match version is 1/2 ounce heavier than the Young standard BCGs. Young MFG does not stake their Carrier Keys, but since this item was borrowed from Rainier Arms for this write up, it is shown staked as RA stakes theirs before shipping them out to customers.


    Bolt Carrier

    Finish- Chrome

    Material- unknown- Company states milspec materials

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- red loctite used, not staked by manufacturer (may be staked by dealers)


    Bolt

    Finish- Chrome

    Material- unknown

    MPI- batch tested

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- blue

















    Last edited by Stickman; 11 March 2008 at 17:09.

  3. #3
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    LMT Enhanced Bolt Carrier Group

    The LMT Enhanced BCG is available in the below pictured M16, or AR15 version. The Bolt Carrier features a third port for venting gas, as well as a bolt with split lugs to reduce stress. The Bolt also uses a dual spring setup, and is chrome plated.


    Bolt Carrier

    Finish- parkerized

    Material- Unknown

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- Staked properly

    Other- Third gas hole for venting


    Bolt

    Finish- Chrome

    Material- Unknown

    MPI- Unknown

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- N/A

    Other- Dual springs/ non captured












    Last edited by Stickman; 11 March 2008 at 15:49.

  4. #4
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    Young Mfg Chrome Bolt Carrier Group

    The Young MFG BCG is available in the below pictured M16, or AR15 version. Both the Bolt and Bolt Carrier are fully chrome plated. Young MFG does not stake their Carrier Keys, but since this item was borrowed from Rainier Arms for this write up, it is shown staked as RA stakes theirs before shipping them out to customers.


    Bolt Carrier

    Finish- Chrome

    Material- unknown

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- red loctite used, not staked by manufacturer (may be staked by dealers)


    Bolt

    Finish- Chrome

    Material- unknown

    MPI- batch tested

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- blue
















    Last edited by Stickman; 11 March 2008 at 17:08.

  5. #5
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    Rock River Bolt Carrier Group

    The Rock River BCG is shown below in its AR15 configuration.


    Bolt Carrier

    Finish- parkerized

    Material- unknown

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- Staked


    Bolt

    Finish- Parkerized

    Material- unknown

    MPI- unknown

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- black















    Last edited by Stickman; 11 March 2008 at 16:29.

  6. #6
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    CMT/ Stag Bolt Carrier Group

    The CMT/ Stag BCG is shown below in its AR15 configuration.


    Bolt Carrier

    Finish- parkerized

    Material- unknown

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- Staked with a linear stamping


    Bolt

    Finish- Parkerized

    Material- unknown

    MPI- unknown

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- blue















    Last edited by Stickman; 11 March 2008 at 16:39.

  7. #7
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    LMT Bolt Carrier Group

    The LMT standard BCG is shown below in its M16 configuration, and is also available as a AR15 Carrier. Please note that the brass look to this Carrier is from a wire brush, and isn't normal from LMT items. The Carrier was coated pretty heavy, and there was some congealed mess on it. The brass brush wasn't the greatest of ideas, but it cleaned it up quickly.


    Bolt Carrier

    Finish- parkerized

    Material- unknown

    Carrier Key- Chrome lined

    Carrier chrome lined- Yes

    Carrier Key- Staked


    Bolt

    Finish- Parkerized

    Material- unknown

    MPI- unknown

    Proof fired- Unknown

    Shot peened- Unknown


    Extractor

    Forged- Unknown

    Extractor insert- Black O-ring
















  8. #8
    Join Date
    Jun 2007
    Posts
    4,756
    Downloads
    0
    Uploads
    0
    ***** THIS GUIDE IS IN DRAFT FORM AND IS CURRENTLY AWAITING ADDITIONAL INFORMATION, BLOCKS AND PICTURES WILL BE FILLED IN AS NEW INFORMATION IS GAINED, AND AS TIME ALLOWS. MANUFACTURERS SHOULD FEEL FREE TO EMAIL OR IM ME WITH MISSING DETAILS. THIS GUIDE WILL CONTAIN EMPTY BLANKS UNLESS THE INFORMATION IS GATHERED DIRECTLY FROM THE MANUFACTURER. BOLT CARRIER GROUPS THAT ARE NOT INCLUDED WILL BE INSERTED AS SOON AS THEY ARE MADE AVAILABLE *****



    Questions and comments can be made at the below thread.


    http://www.weaponevolution.com/forum...read.php?t=339

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts