This. I didn't see anyone say a Serbu didn't need a stamp. Being AOWs, they need a $5 tax stamp to transfer. All that was being said here is that even though it fires a shotgun shell, a Serbu (or KEG) is not a "shotgun" under IN or federal law, because, since they never had a shoulder stock on them, they were never designed to be fired from the shoulder. Note that this applies to a virgin receiver or to one that came from the factory with PGO. Once it has a shoulder stock on it, it is forever thereafter a shotgun. If its barrel is less than 18" OR it's overall length is less than 26", or both, THEN you would have a SBS, which would be unlawful according to Indiana state law, however, until it has a shoulder stock, those length limits do not apply.
Think about the Taurus Judge, and others that fire shotgun shells. No way is that barrel or OAL over the lengths for SBS, but they're still legal here. No license required to buy, just to carry off your own property.
As for the Shockwave, no, I am not familiar with that, however, again: virgin receiver or PGO from factory, I would think you could build it without any headaches or special licenses as long as both barrel and OAL length requirements are met. If you're BUILDING a Serbu-style weapon (i.e. PGO with shorter barrel than SBS limits), that would require a $200 tax stamp.
In sum: Buy from a mfgr, need to clear the background check and pay $5.00 to Uncle Sam. Build it yourself, clear background check and $200.00 tax stamp.
Hope that clarifies what I was saying.
Blessings,
Bill
There still seems to be some confusion about the shockwave style gun. The ATF clarifies the issue in THIS letter that I posted earlier. Key points below.
Based on this legislative history and, in an effort to achieve consistent application of the law, ATF utilizes 26 inches as a presumptive standard to determine whether a firearm is "capable of being concealed on the person."
under NFA, barrel length is relevant only in regard to rifles and shotguns. Firearms that come equipped with a pistol grip in place of the buttstock are not "shotguns" as defined by the NFA. Therefore, in determining whether a firearm is "capable of being concealed on the person," barrel length is considered only to the extent that is constitutes a portion of the overall-length measurement of the firearm.
These two quotes are all you need to determine that the ATF does not deem a PGO, like a Mossberg 500 cruiser, that has never had a shoulder stock, a "shotgun." Therefore, you don't need to meet both the OAL and barrel length requirement. The ONLY requirement that a PGO shotgun must meet under NFA is over all length. Barrel length is irrelevant. You could have a 25" long pistol grip and receiver and a 1.5" barrel and you'd still be golden.
The Judge is legal because has a rifled barrel. If it was smooth-bore, it would be an AOW.
I see no reason why a PGO (or virgin) shotgun receiver couldn't have a rifled barrel chopped to any length and remain legal without a stamp, it would be no different than the judge. IANAL.
IANAL, but according to the ATF, since the shockwave type guns exceed the maximum overall length of for what they consider an AOW, you don't need a rifled barrel. That requirement only applies to concealable guns.