im sure this doesnt help but i can never resist a chance to show off my mossber 590a1 AOW with a 14" barrel

With a stock its a SBS and a $200 tax stamp. With the pistol grip its an AOW and a $5 tax stamp.It would be nice to have that with a knoxx. Nice shotty sourpatch
No, you'll get fined heftily if you believe so.so to get that barrel, you only need a $5 stamp? Thats cool. Thanks for clearing that up Dris
An OAW can never (never ever) have had a buttstock installed onto it at any time past/present/future.can you put a pistol grip on a normal shotgun and be ok?
Yep, you sure can. Sorry, I thought you were still asking about the AOW.I am talking about a normal mossberg that already has a buttstock. Just a plain jane 500. Can you put a pistol grip on it?