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Rules regarding interchangeable parts

Discussion in 'NFA Firearms and Accessories' started by evan price, Nov 5, 2012.

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  1. evan price

    evan price Member

    Dec 7, 2005
    http://www.ohioccw.org/ Ohio's best CCW resour
    Quick question-

    Suppose I decide I want a short barreled pump shotgun.

    I follow all the NFA and ATF rules and legally get my stamp.

    Suppose the host SBS shotgun is a common one like a Mossberg 500.

    Would I be allowed to remove my short barrel and put a long barrel on for an afternoon of trap?

    I know I could never mount the short barrel on any other receiver.

    If I owned more than one Mossberg 500, and the SBS barrel was now sitting unmounted in the safe while I was using the long barrel on the SBS receiver, would this somehow be constructive possession of an unregistered SBS? What if I want a 16" barrel and a 14.5" barrel? Is that two form 4's with the same receiver?

    Does this pertain to ARs as well, or any other interchangeable-parts type firearm? If I have a SBR M4 upper and its SBR registered lower, can I put a regular 20" HBAR upper on the SBR lower for some long range target shooting?

    I seem to recall one needed to register full auto lowers by caliber- or was that just the drop in auto sears and HK triggerpacks- what about an SBR upper in a different caliber? Or a different SBR upper in the same caliber? If the lower is already SBRed does that mean I can buy as many SBR uppers as I want? Or is it only one SBR upper and one SBR lower, forever married and inseparable?

    I'm confused, because I don't think in 1934 they figured on guns with parts that interchange like LEGOs.
  2. 243winxb

    243winxb Member

    Jul 7, 2004
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