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Thread: What is a multi-caliber lower?

  1. #1
    Gunco Veteran patjsimpson's Avatar
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    Default What is a multi-caliber lower?

    Just saw this in another post... If I have a 5.56 lower would I be unable to do one of the other Caliber uppers?

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    gunco irregular moleman's Avatar
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    Some states make you list what caliber it is stamped when you register it and then you're stuck with that caliber. Some manufacturers started marking multi so that people could put the other calibers on it. Your 5.56 pattern lower should take all of the standard caliber conversions for an ar15.

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    Gunco Veteran AKarl_12's Avatar
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    You mean if I have an AR that shoots 5.56x45, I can get an upper that shoots 5.45x39 and just drop it on then go shooting?
    I know this sounds like a dumb question, but know nothing about ARs.

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    No Hope For Me Coils's Avatar
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    Yes.

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    Gunco Veteran patjsimpson's Avatar
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    cool... Hopefully my state doesn't have the caliber issues. I will have to look it up I guess.

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    gunco irregular moleman's Avatar
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    You can get an upper in 22lr all the way up to 50 beowulf for your gun.

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    Gunco Veteran patjsimpson's Avatar
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    I have heard good things about the 458 socom.

    btw... does anyone know what the Washington State laws are around calibers on the receiver?

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    Gunco Rookie coctailer's Avatar
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    Washington is good to go.

    Put any caliber upper you want on there.

  9. #9
    Gunco Veteran patjsimpson's Avatar
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    Thanks coctailer.... Wow that shotgun on your site is crazy! Is that legal in WA because it is AOW instead of SBR? Not sure if shotguns under 18 usually fall under SBR or not.

  10. #10
    No Hope For Me 1biggun's Avatar
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    Some states make you list what caliber it is stamped when you register it and then you're stuck with that caliber
    INTERESTING AND NEWS TO ME. WHAT STATES ARE THIS WAY??? IT MAKES ME PAUSE BECAUSE I HAVE TO RECIVERS MARKED 223/5.56 AS WELL AS SOME AK RECIVERS MARKED 7.62X39.. i HAVE NEVER HEARD IF THIS BEFORE NONE OF WERE GOING TO BE WHAT THERE STAMPED. NEED DETAILS PLEASE. I WAS SAVING ONE FOR A 50 BMG UPPER. I MAY WANT TO GO A DIFFERANT ROUTE IF I CANT SELL IT EVERWERE LEGAL DOWN THE ROAD.

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