This isn’t necessarily new, but it has regained popularity here recently. The Arsenal RS-1 Knife/Revolver is a fixed-blade knife with the ability to fire six rounds of 22 short.
This is an NFA item, and falls under the category of AOL or “Any Other Weapon”. Unlike the SBR or SBS, the tax stamp is only $5 instead of $200, but you do still have to file the paperwork.
The price tag for one of these bad boys hovers around $2,000. You have to give Arsenal props for creativity on this piece, but how practical is the “Knife Gun”? Would you carry it?