BATF has defined a rifle essentially as a firearm firing a single projectile from a barrel designed to impart spin onto the projectile to stabilize it. Jumping over to paintball thought here...what if a tool steel button was ran through the barrel creating straight lands and grooves to not impart any spin whatsoever. I have somewhere in the garage a “straight rifled” barrel on a spyder pb marker which is actually a good shooter as long as the barrel is clean and dry. On a traditional rifle bullet it seems it would not do so well, but stick a pistol round in it where you are looking at short fat rounds and tumble is not as detrimental, and shouldn’t really start happening until some ground has been covered.
*You don’t have spin stabilization...not a rifle.
*It’s not smoothbore nor multi projectile...not shotgun
*Since it’s not ^^^ neither sbr or sbs rules apply. Seems to me it would be an Other.
Still not interested in product, just the loophole exploitation.