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Thread: How strong are AR-15 Lower Receivers?

  1. #11
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    I have seen them used by troops to stand on, it dosent get any dumber than that.

  2. #12
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    I've only heard of lowers breaking (during use) on the old M16 and M16-A1s breaking at the back end when doing bayonet training. I don't know if the military has been able to break the newer reinforced A2 lowers.

    I've seen an lower with a broken off ear of the triggerguard (this was on a cast Essential Arms lower). (if you don't support the ear when hammering in the roll pin, you can break it).

    I've also seen transferable full-auto lowers that had the hammer pins go out of round. There are a few Class II manufacturers that can repair these.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  3. #13
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    Thanks. My primary concern is the 2 pivot pin bosses on the front of the
    receiver that the pivot pin passes through.

    I've seen pictures of the new polymer framed AR-180B breaking those bosses
    off. Then I wonder, "could that happen to an AR-15"?

    I guess not. I can't seem to turn up a case of an AR-15/M-16 breaking at that
    point.

    The AR-15 seems to be, one tough little rifle.

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