Is anyone familiar with this shotgun or one similar to it? It's a 12+1 bullpup pump shotgun.

https://www.keltecweapons.com/shotguns/ksg

Also if I were to put a vertical front grip or an angled front grip on a shotgun like that would it cause any kind of NFA issue?

If the gun sucks or better yet if there are better options out there please let me know what my options would be.

A high capacity 12 gauge seems pretty cool. I saw one in a store today and the concept seems pretty cool. Whether or not the gun is a decent gun is a different subject but I haven't been on top of the shotgun world for a while now.

Also Kel Tec has never come across to me as a great firearm manufacturer, that said I've never shot one.