Page 1 of 7 123 ... LastLast
Results 1 to 10 of 69

Thread: BCM Fail to Extract Questions

  1. #1
    Join Date
    Jun 2013
    Posts
    213
    Feedback Score
    7 (100%)

    BCM Fail to Extract Questions

    I have a new Mid 16. Let me say so far BCM is working with me on this issue. I think they make a Quality product and service so far has been good. I just would like experiences and opinions with more AR time than me, so that I have a full understanding as what is happening.

    When I first shot it ran about 5 rounds with no issues. Then I had some failure to extracts. I tried 3 different mags with the same results. The fired case was still in the chamber as the next round from the mag was trying to feed.

    I contacted BCM, and after some trouble shooting they wanted me to send the BCG for them to test. Testing resulted in no failures, and they seem very confident it was the ammo, and requested I try something else. They claim a lot of ammo is sub standard, ie not NAT0 spec 556, may be under powered or standard case sizeing and may not work properly in the weapon. Others have mentioned a lot of ammo now marked as 556 is really 223.

    When I received the BCG, I tried several different loads, Independence, Winchester white box, Lake City, and Federal XM193 all 55 grain.

    The only ammo that worked with out any problems was the Federal XM193. I had the same failure to extract with all the others. The Independence is supposed to be NATO 556. So Maybe they are on to something.

    The other ammo is underpowered compared to the Federal, almost like the difference between a standard vs manum load but I would think if it was an underpower ammo issue I would get a short stroke and/or failure to eject not extract. It seem to me a failure to extract would be related to the extractor. Also if I put one round in the mag and shoot it it will fire, the bolt will lock open on the empty mag and the case is in the chamber, if I hit the bolt release and pull the charging handle back the round will eject.

    I know a lot of people that are able to shoot almost anything without any problems in their AR's, 223 or 556 NATO. I have never had another weapon that would not shoot so many different types of ammo So why is this so picky?

    Also if the Independance ammo is supposed to be M193, but it does not work, how can I verify that any other ammo that claims to be m193 or any other Mil Spec/NATO stand will work, especially now that ammo is so hard to get. If I had problems with cheap ammo 1 out of 20 I could live with it for plinking as long as I could find something that would work 100% of the time for other purposes, after all thats way I bought the BCM, for all the great reviews. RELIABILITY is Everthing for me.


    Any and all experiences comments are greatly appreciated.

  2. #2
    Join Date
    Feb 2012
    Location
    Miami, Fl
    Posts
    179
    Feedback Score
    0
    What is your buffer\spring combination?
    Custom pimp my Orange County Overhauled American Sons of Enhanced M4gery Game Changa Neva Been Done Befo piston driven Tactikul Desert Carbean with its own mags

  3. #3
    Join Date
    Jun 2013
    Posts
    213
    Feedback Score
    7 (100%)

    Standard H Buffer

    Knew I forgot something. That was another question I had?

  4. #4
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,902
    Feedback Score
    104 (100%)
    Which buffer and spring do you have? Do you know how to identify your buffer and spring? Is this a factory carbine or some kind of build?

    Quote Originally Posted by bjxds View Post
    Knew I forgot something. That was another question I had?



    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

  5. #5
    Join Date
    Aug 2012
    Location
    NN, VA
    Posts
    2,177
    Feedback Score
    2 (100%)
    Immediate thought is buffer and spring like everyone else...

  6. #6
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,902
    Feedback Score
    104 (100%)
    Did you install the rubber O-ring onto the extractor? If so, remove it. Did you clean the chamber and PROPERLY lube the BCG before shooting it? What kind of lube are you using?



    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

  7. #7
    Join Date
    Oct 2012
    Location
    WI
    Posts
    1,471
    Feedback Score
    26 (100%)
    I am curious as to what ammo BCM used. I am guessing maybe M855.

    Though, from my experience and some other peoples here, Independence M193 is hotter than Federal XM193. So it should be working if underpowered ammo is your problem.

    You stated in your post above, as the title, you run a standard H buffer. That is what I have used without issue. Do you run a standard spring?

    Also is this a factory build from BCM? Or upper?

  8. #8
    Join Date
    Dec 2011
    Posts
    950
    Feedback Score
    0
    Have you done forward assist, fire, forward assist, fire, forward assist, fire? Did it have the same issue?

  9. #9
    Join Date
    Nov 2011
    Posts
    6
    Feedback Score
    7 (100%)
    Try changing the buffer and spring. A friend had the same problem but it was related to a build involving shortening the barrel and the gas port was not enlarged.

  10. #10
    Join Date
    Sep 2008
    Posts
    406
    Feedback Score
    15 (100%)
    What Do The Spent Cases That Failed To Extract Look Like? Are The Spent Case Rims Deformed? Marks On The Case Walls From Burrs Or Other Obstructions? I Am Wondering If You Have A Tight Chamber, Or Burr, Or Laquer Build Or Similar, Going On In the Chamber. Have You Closely Inspected And Cleaned The Chamber? We Need Pics Of The Spent Cases.
    Last edited by Jimbo45; 07-02-13 at 08:29.

Page 1 of 7 123 ... 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
  •