So, while it would be unlikely under federal law for shockwave to be considered a short-barreled shotgun because of its pistol grip, under Texas law, it may fall under that definition.
As such, I suspect that it may fall under "short-barrel firearm", and possession without proper paperwork
![Yawn :yawn](./images/smilies/Yawn.gif)
Ah,the "shockwave" indeed...