Please see my post #14.
My friend is a serious sort, not prone to fish stories.
We’ve known him and his family for years.
If he recommends it, I’ll consider it; try it.
He picked up his (personal) AR and showed me how to make the change from spring to the piston in less than a minute.
What can it hurt? Especially If I can do a better job of putting lead on target, fast, well down range.
FWIW, just to stir the pot, he also believes the 870 is the perfect home defense shotgun for his wife at home to have at the ready.
I would suggest a pistol or revolver for her to fight her way to the shotgun. I don’t disagree with a shotgun, but recommend #1 shot (not the easiest to find) as that gives more holes, than #0, #00, or #000, and #1 will penetrate through and through a human. For 3 inch magnums that is 25 each .30 caliber pellets for each round. Certainly with a rifle you wouldn’t feel poorly armed if you had the ability to send 25 each .30 caliber projectiles at a threat.
I don’t normally recommend a pump action. My notion is you don’t owe the bad guy a ‘rack sound’ which they might use as an opportunity to fire first. You do owe yourself a duty to be sure of your target and what lies behind it.
I use double barrel 12 gauges, and have several identical ones each of in several rooms. Stoeger makes a coach gun that is reliable and economical.
Dual triggers means that if one trigger doesn’t work, the other might.