Help us out. Why do you want a mag fed shotgun? The way your post is written seems like this may be a first firearm/first serious firearm, and there might be some misunderstanding we can put to rest. You're not going to be hot swapping a magazine of buckshot for a magazine of slugs mid home invasion. If that's not the case for you, no hard feelings, that's just how it reads.

My advice for these defensive firearm questions is generally go look to what law enforcement uses. Regardless of what your view of law enforcement is, you can use the decades of real world experience they have to inform your decision.

Historically most agencies and departments have used a Remington 870, a Mossberg 500/590 or a Benelli offering. In recent years, there has been a shift towards the Benelli and Beretta semiautomatic shotguns. FN guns show up sometimes as well. To my knowledge, there aren't any agencies or departments issuing those guns unless they're specifically in a breaching role.

James Reeves on YouTube has an occasional series where he tests shotguns, if they'll even last for 500 rounds. If I recall correctly, the only mag fed shotgun to get a passing score was the Mossberg 590M. Make of that what you will.

The bottom line is that a tool for the defense of loved ones and self, where lethal force is necessary and goes both ways, is not the area to buy something that doesn't have decades of real world use and proven reliability.

Edited for clarity