Looks like they're trying to shut it down using ITAR:
http://reason.com/blog/2013/05/09/state-department-cracks-down-on-3d-weapo
Revdisk: Any idea if the State Department has a case?
Wow. I've seen the ITAR list and rules and had to go through dealing with it, and I can state pretty categorically, that single-shot, small caliber, low lifetime pistols are no where on it.
Basically, there isn't a "zip gun" category. And any ITAR restrictions on information/plans are on those areas where the information would be considered to give a foreign military an advantage. In this case, I fervently HOPE militaries attempt to equip their armies with this.
Though, this sets a potentially bad precedent if it holds up. It IS an ITAR issue to export various other small arms. Does that mean that the template plans for an AR lower are now ITAR restricted, as an M-4 IS an ITAR restricted item?