I would take all those bets, and easily take your money. I practice with mine a lot. If it is within 30 yards, I can hit it, whatever it is, running or flying. And it is going to die.I'd pay to see you try to shoot a duck or pheasant with it... heck I might even pay to see you fire it at a man size target five times.
My advice is to see if you can get a shoulder stock that will also fit in that tube.
Its all good. Actually, I plan on putting a Blackhawk Knoxx Axiom recoil reducing stock on this gun, except all the dealers I use are sold out right now. It does give you a whack when you shoot it - and it can actually make your forearm bones ache if you overdo it (ask me how I know). It is an emergency weapon as configured, or a breacher if you have that specific need.I wasn't trying to comment on your accuracy but rather on the results would be to your wrist.
I have an ATP-8 Mossberg 500 and tried it once with a pistol grip. I am not a small guy but magnum rounds with a pistol grip 12 gauge is just not something I want to do ever again. I use the full stock and am very happy to shoot it - all eight rounds if need be.