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MPI bolts in stock!

Discussion in 'Black Rifle Forum' started by Cole125, Mar 5, 2013.

  1. Warp


    Jul 31, 2005
    I'd rather wait and grab a 'mil spec' bolt, personally.
  2. Cole125

    Cole125 Silver Member

    Apr 5, 2008
    Far West, USA
    :wow: And they are still in stock. If they were on BCMs website they would only last 5 minutes!

    I don't see anything about them not being mil-spec, they are magnetic particle inspected which is a "high end" spec.
    Last edited: Mar 6, 2013
  3. humanguerrilla


    Jul 25, 2006
    the woods
    8620 steel isn't milspec and I don't see anything about shot peening. AR Stoner is Midway's house brand made by different companies. Who made them? The testing could've be done on batches. Companies are ramping up production on easy to get out commercial parts, semi-auto carriers and 8620 bolts. I may be wrong but I don't think a similar 8620 bolt would ever be on BCMs website.
    Last edited: Mar 6, 2013
  4. fnfalman

    fnfalman Chicks Dig It

    Oct 23, 2000
    California & New Mexico, US
    You can do magnetic particle inspection on crappy steel products too.:dunno:

    I love how the gun industry throws out these acronyms like they're some sort of high-falutin' stuff: MPI, Magna Flux, Tricorder, Gamma Ray, ad nauseaum.

    We do magnetic particle tests and dye penetrant tests on many pipe welds that aren't all that high-tech or fancy.
  5. Warp


    Jul 31, 2005
    Do you know what the mil spec is?

    Because it isn't 8620 Steel. If it were mil spec it would be shot peened Carpenter 158.

    There are other specs not listed that I'll bet aren't "mil spec" either.

    The reason it wouldn't last 5 minutes on BCM's website is because it would be a higher quality part if it were a BCM bolt. While BCM hasn't listed a stand alone bolt in stock for months that I know of, their last price was $69.
    Last edited: Mar 6, 2013