Pennsylvania Firearm Owners Association
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  1. #21
    Join Date
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    We have all three of these calibers in our MG rental program and the 50 Beowulf is the beast of the group.

    458 SOCOM uses a Tromix upper.
    50 Beowulf uses a Alexander Arms upper.
    450 Bushmaster uses a Great Lakes Firearms upper.

    Personally, I prefer the 458 SOCOM but 450 Bushmaster has a bigger ammo selection.
    Washington County Machine Guns & Tactical Range -- CMP Affliated Club -- 07/02 FFL/SOT and Type 20 FEL (Manufacturer of High Explosives)
    Specializing in Bachelor parties with 50+ machine guns including M2HB, M249 SAW, M1919, RPD, and M60.

  2. #22
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    *UPDATE:

    Got everything put together. 18" .458 Socom with mid-length gas. Barrel was dimpled for gas block set screw.

    First test fire, went BANG, but failed to extract empty case from chamber. Had to mortar it out. Took everything apart, cleaned and lubed it, and gave another test fire. BANG again but no extraction. Had to mortar the empty case out again.

    Tried a trick that I think Uncle Jumbo mentioned in the "All things AR thread" - got some aquarium tubing and put it on the BCG end of the gas tube and tried to find the best airflow while adjusting the gas block. Seems like maybe it needs to be slightly off center(IDK?).

    Also I had a Spike's T2 buffer installed and have removed it and put a regular carbine buffer in.

    I'll have to wait until tomorrow to resume testing. So frustrating not having shit work right away.

    Last edited by ExFlyinguy; December 11th, 2019 at 10:59 PM.
    "It seems that the Constitution is more or less guidelines than actual rules"
    My feedback: http://forum.pafoa.org/showthread.php?t=305685

  3. #23
    Join Date
    Sep 2011
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    If you chamfer the gasport before assembly it allows for some misalignment of the gasblock

  4. #24
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Quote Originally Posted by USMC3531 View Post
    If you chamfer the gasport before assembly it allows for some misalignment of the gasblock
    Thanks! I'll give it a try
    "It seems that the Constitution is more or less guidelines than actual rules"
    My feedback: http://forum.pafoa.org/showthread.php?t=305685

  5. #25
    Join Date
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Well got out again today, and more failure, although I did see some progress.

    I went from "no extraction" to mostly "stovepipe" ejection. Nothing chambered another round or locked a bolt back on empty.

    Getting too frustrated @ ~$1.70/round.

    Friggin Bear Creak Arsenal won't answer their phones or emails.
    "It seems that the Constitution is more or less guidelines than actual rules"
    My feedback: http://forum.pafoa.org/showthread.php?t=305685

  6. #26
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Check the gas key on the BCG

  7. #27
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    Dec 2013
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    Pittsburgh, Pennsylvania
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    I'm happy I found this thread. I've been thinking about buying or building an upper in one of these calibers.
    I'm leaning toward the .450 BM.

  8. #28
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Quote Originally Posted by 85MikeTPI View Post
    Check the gas key on the BCG
    Gas key seems solid. I've been all over the web searching tips. Made sure there's no O ring in the extractor per Arf.com.

    At this point I'm thinking undersized gas port but I'm hesitant to go drilling on the barrel before I decide on whether I want to spend the shipping charges for a $50 barrel to return for warranty.

  9. #29
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Quote Originally Posted by SuperVel View Post
    I'm happy I found this thread. I've been thinking about buying or building an upper in one of these calibers.
    I'm leaning toward the .450 BM.
    Want a great deal on a 458 barrel? LOL

  10. #30
    Join Date
    Dec 2013
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    Pittsburgh, Pennsylvania
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    Default Re: 450 Bushmaster 458 Socom 50 Beowulf

    Quote Originally Posted by ExFlyinguy View Post
    Want a great deal on a 458 barrel? LOL
    Haha no thanks.
    Hopefully you get it running reliably soon.

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  1. 450 bushmaster, 458 socom or 50 beowulf
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