I have regarded the pump-action shotgun as my “go-to” firearm for some time. This is due to police experience when the shotgun was not a personal weapon but the “community” firearm shared by many officers. It had to come up shooting every time, and there were rules concerning its storage and load.
I have fired quite a few AR-15 rifles, including both direct impingement and piston driven. Performance has varied, but all piston guns were more expensive than the standard direct-impingement AR-15.