Jabberwalker Jabberwalker:
Is this another Second Amendment thing?
Honestly, I don't know if it is or isn't. I think it's more just one of those things that the pointy-headed little freaks haven't thought to regulate. In any case, it is perfectly legal to own a recoiless rifle - even in California - and the only thing I have to think about here is the license and registration for the trailer it's mounted on. I do not ever fire it with anything other than a blank round and this I only do once a year or so at the annual MVCC meetup.
In addition to the 76 I also own a 20mm Solothurn (S-18 variant) that was grandfathered in the 1968 Gun Control Act. Meaning that it, too is legal but I have to maintain records on it as it is illegal to own a new one.
No one ever thought to regulate the larger 76mm which is powerful enough to disable and maybe even hole a MBT.