Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: BCM bolt question

  1. #1
    Join Date
    Oct 2014
    Location
    Virginia
    Posts
    234
    Feedback Score
    1 (100%)

    BCM bolt question

    I just finished my BCM 14.5 carbine and took it to the range. I was cleaning it last night and took the extractor out and noticed there was no o-ring. I was under the impression all BCM bcgs had an o-ring. Was I wrong? Thanks, guys.

  2. #2
    Join Date
    Jan 2011
    Location
    South Texas
    Posts
    2,740
    Feedback Score
    52 (98%)
    If you buy a BCG it comes with an uninstalled O ring, but they don't put 'em in there. I wouldn't use one. With the new springs and black inserts I've never had a problem with extraction.

  3. #3
    Join Date
    Sep 2007
    Location
    AZ
    Posts
    27,214
    Feedback Score
    14 (100%)
    You don't want the o ring in there. It's an out dated, idiotic solution to old, overgassed carbines.
    "You people have too much time on your hands." - scottryan

  4. #4
    Join Date
    Feb 2014
    Location
    USA
    Posts
    1,710
    Feedback Score
    204 (100%)
    Quote Originally Posted by markm View Post
    You don't want the o ring in there. It's an out dated, idiotic solution to old, overgassed carbines.
    This x100000000000. All those o-rings go straight to the trash!
    Philippians 4:13

  5. #5
    Join Date
    Jun 2014
    Location
    Behind Enemy Lines
    Posts
    1,584
    Feedback Score
    3 (100%)
    Keep that extractor clean with a handy spare and you should have no problems.
    "We must, indeed, all hang together, or assuredly we shall all hang separately." -Benjamin Franklin

  6. #6
    Join Date
    Apr 2011
    Location
    IL
    Posts
    188
    Feedback Score
    0
    I was getting FTEs about every 5-10 rounds in my 300blk build that had a BCM BCG in it. The FTEs didn't start until about 400 rounds into the life of the gun. I installed the O ring that came with it and it has run fine since.

  7. #7
    Join Date
    Jan 2015
    Posts
    69
    Feedback Score
    0
    .....
    Last edited by connorr93; 02-28-19 at 11:22.

  8. #8
    Join Date
    Oct 2014
    Location
    Virginia
    Posts
    234
    Feedback Score
    1 (100%)
    I also noticed a lot of "upgrade" kits include an o-ring. And DD puts what they call an extractor booster in their bolts.

    Why would you not want one? Is it bad to have one of these?

  9. #9
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,902
    Feedback Score
    104 (100%)
    O-rings are a band-aid and not required for properly built rifles and carbines. Over time they have migrated into the standard AR world. Their use on SBR's is also rather dubious. I have never needed to use one with a properly built weapon with thousands and thousands of rounds down range.

    Quote Originally Posted by odugrad View Post
    I also noticed a lot of "upgrade" kits include an o-ring. And DD puts what they call an extractor booster in their bolts.

    Why would you not want one? Is it bad to have one of these?



    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

  10. #10
    Join Date
    Oct 2014
    Location
    Virginia
    Posts
    234
    Feedback Score
    1 (100%)
    Do you know why DD would put them on their extractors?

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

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