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Thread: BCG Materials

  1. #11
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    The original bolts were made from 9310 IIRC and they switched to Carpenter 158 after bolts broke in the 50,000-60,000 round count range.

    Quote Originally Posted by jwperry View Post
    I'd be curious to know the lifespan on a HP tested 9130 bolt compared to the C158 HP tested bolts.



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  2. #12
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    Quote Originally Posted by Iraqgunz View Post
    The original bolts were made from 9310 IIRC and they switched to Carpenter 158 after bolts broke in the 50,000-60,000 round count range.
    50,000?

    That's not TOO bad. I'm assuming rifle system.

    I did a google search a few weeks back and it brought up an OLD thread on some Machinist forum where some bottom feeder was looking to find a sub for C158 to make bolts.

    Seems C158 had been a tough find for a long time.
    "You people have too much time on your hands." - scottryan

  3. #13
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    Re: BCG Materials

    Quote Originally Posted by markm View Post
    50,000?

    That's not TOO bad. I'm assuming rifle system.

    I did a google search a few weeks back and it brought up an OLD thread on some Machinist forum where some bottom feeder was looking to find a sub for C158 to make bolts.

    Seems C158 had been a tough find for a long time.
    Is there a current shortage of C158? Possibly pre dating the late 2012 panic inducing events?

  4. #14
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    Here's the bcg I bought yesterday: http://www.americanspiritarms.com/up...rier-assembly/

    I thought about buying a Phase 5 Tactical bolt carrier and then piecing some parts together to finish the bcg build.

  5. #15
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    Quote Originally Posted by mtdawg169 View Post
    Is there a current shortage of C158? Possibly pre dating the late 2012 panic inducing events?
    From what I've heard.. yes.

    It's always been a limited supply raw material. That 4 year old thread I referred to indicated that this guy's shop machined Bolts for a customer who provided their own C158 3/4" round stock.
    "You people have too much time on your hands." - scottryan

  6. #16
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    Quote Originally Posted by Iraqgunz View Post
    The original bolts were made from 9310 IIRC and they switched to Carpenter 158 after bolts broke in the 50,000-60,000 round count range.
    No, the original was 8310, changed in the early 60s, IIRC.

    Bottom feeders are still using 8310 from what I heard.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

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