The Government Profile Barrel Is Dumb

I was doing some research on barrels and was a bit puzzled to find that so many top flight manufacturers (e.g., Daniel Defense, BCM, etc.) are still putting “government profile” barrels on their guns. The best research I can find on why such a thing exists shows the idea to be extremely dumb.
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5 Responses to The Government Profile Barrel Is Dumb

  1. Nemo says:

    “engineering resources would have performed a failure mode and effects analysis of the problem. A failure investigation team of engineers should have been commissioned, not a military team.”

    Why in heck didn’t Colt do that? Rifle/barrel Engineer’s at Colt should have been all over the “burr problem” as part of their quality control procedures.

    Most anyone who has has had experience drilling holes in metal knows that there is a tendency for burr creation at the point where the drill bit breaks through. That’s why machining drawings usually have a note to “deburr all through holes” on them. Deburring a hole that breaks through the interior of a barrel would be difficult, but not impossible.

    • JDubs says:

      It’s actually not difficult at all. It’s called a bore lap. Also, if you ream the port after “drilling through” you’ll end up with a cleaner hole to work with.

    • M. Sage says:

      We could always switch to using an EDM to make the gas port hole. Bit more expensive than the way it’s typically done, but… well… EDM.

      Been a long time since I’ve messed with an EDM, but I don’t remember them throwing burrs like mechanical machining.

  2. Bad_Brad says:

    Daniel Defense, BCM,etc, use them because there’s a ton of Government Profile barrel blanks on the market ad they’re dirt cheap. Barrel profiles are quite the science.

    • M. Sage says:

      Blanks don’t come with a profile, they’re a long cylinder with rifling inside. Barrel maker cuts to length, threads, profiles, chambers, etc. They’re generally just round stock that’s been gun drilled and rifled to the proper diameter and pitch.

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