Finally got to shoot my new BCM!

Discussion in 'AR-15 Discussion' started by ZeusEcho, Oct 1, 2012.

  1. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    It's a 16" middy with hammer forged barrel. Here's a picture when it had the sightmark but that was returned so I just used the troy battle sights and zeroed at 50yards.

    Edit- ugh! I don't know why photobucket still rotates the image after I edit it, sorry, seems to be an issue with iphone pics.

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    From the very first shot I was like :D and then :cool: and more of :D

    It cycled smooth and just felt great!!! Recoil is minimal and the muzzle is back on target very quickly. I think the Daniel Defense Superior Suppression Device may have helped with this as they note reduced muzzle rise on their website. For reference my AR15 experience previous to this was limited to carbine length with standard A2 flash hiders.

    Put about 250 rounds of Federal Lake City 5.56 62gr XM855 and 50 rounds of Remington 55gr .223 without a hickup.

    I noticed the ejected casings are hitting the deflector- what's causing this and should I adjust the buffer to get them ejecting closer to 3:00?

    Here are two pictures, first after the 300 rounds, then after cleaning (the deflector only, didn't clean the BCG yet in that shot). You can see that after cleaning there's a small spot where the coating is worn through already with only 300 rounds. Based on location of that spot it makes me think the ejection is very far back like 5:00-6:00.

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    Overall- love this rifle!!! Thanks again to everyone here for sharing your experience and providing guidance to us noobs. I'm very happy with the choices I made for my first AR.
     
    Last edited: Oct 1, 2012
  2. JonM

    JonM Moderator

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    Send bcm an email describing the problem you will get an answer prolly within the hour
     

  3. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Good idea Jon thanks.

    I did some searching and there seems to be a debate as to if this is normal / acceptable so I guess that was part of my question- is this even a problem?
     
  4. JonM

    JonM Moderator

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    Its not a real issue but it should be chucking em out at 3 oclock. It could be ammo. Have you modded the gun or have the black oring under the extractor??
     
  5. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Have not modded the gun. It's BCM FA BCG without the o-ring. Should I put the o-ring in?

    What about the ammo would cause this?
     
  6. JonM

    JonM Moderator

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    Try the insert if it came with the rifle. I think hotter ammo can cause that. But its something that bcm can fix, the turn around is lightning fast if they have you send it in. I sent mine in because i had a bad lever installed turn around was right at 5 days till i had it back.
     
  7. Quentin

    Quentin New Member

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    I wouldn't put the O-ring in, you're getting positive extraction already. Funny, my BCM kicks the casings back about 4:30 and dings up the deflector too. I've got the BCM BCG and their H2 buffer. My DD ejects more toward 3:00 and not as much wear on the deflector. It has the DD M16 BCG and BCM H buffer. Both are 16" middys. I shoot some at the indoor range so get to keep more brass when it comes back at 4-5.

    Yep, that's the Anchor Harvey receiver and should be good to go. Glad to hear your BCM is working out for you!
     
  8. Quentin

    Quentin New Member

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    Like minds don't always think alike! :D
     
  9. JonM

    JonM Moderator

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    Oh btw my bcm and my wifes both middies kick it out 3oclock. My precision rifle with bcm carrier krieger barrel and rainier ultramatch upper hits 3:30
     
  10. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    So would a heavier buffer move the ejection forward?
     
  11. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Thanks man! I almost hit the range on Sunday morning also because I didn't want to wait till next weekend to get her back out there. :D
     
  12. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    So I've read that when the charging handle is pulled back completely the bolt should still be partially exposed (about 1/4") and if it's not, and goes back fully behind the ejection port, that could be causing the casings to hit the deflector there. Is that correct?

    My bolt goes back fully behind the ejection port when the charging handle is pulled back.
     
  13. Seven

    Seven New Member

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    Both my BCM's (middy and rifle) do the same thing. I don't worry about it.
     
  14. ZeusEcho

    ZeusEcho Member Lifetime Supporter

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    Thanks Seven. Figured it might not be a big deal but sometimes the little things bother me until I make it right.