Perhaps not, but they have the advantage of not being NFA and mine (one each in .22 and .25) were very cheap... but bought when they were still in production and I had an FFL.  I would consider any pen-gun (even an NFA one that fired as-is) as a novelty at best, unless one requires super-deep concealment of a last-ditch shot for some reason (and I'm sure there are some folks with that need).  But there is nothing wrong with novelty, and I have bought guns for far less.




How ridiculous have prices gotten on them?  I have never even looked into it. If prices have gotten are downright silly, and you don't mind the tax stamp, I'm sure you could find a niche shop to build one custom for you, from scratch, just like you want it.  

I'm not aware of any mass-produced, NFA pen guns in current production, but that doesn't mean they aren't out there.  If anyone else is aware of one, I'd be almost as interested as the OP to know about it.

I paid $133 each for mine, brand new.


Yes, at that price I would definitely be looking for something NFA, even if it has to be a custom build.