PDX1 Defender for me.
I made some of my own flechette rounds for 12ga.
Emptied the lead pellets out of a 12ga round and filled it with 1 inch long pieces of welding rod that I had cut with diagonal cutters so both ends were sharp. I was able to fit around 60 of them in a 12ga shell.
I shot them at both a sheet of plywood and a room temperature turkey. The rods spread out to cover an 8 inch area at 20 feet and many of them exited the back of the half inch sheet. Almost all had turned side own at 20 feet.
When I shot the turkey it was at 10 feet, or about the average distance across a bedroom or living room. The bird was shredded. Really shredded. And most of the rods exited from the bird. It was a sixteen pound Thanksgiving freeby that I got from Ralph's. I used it as a target because "somebody" left it in her trunk so long I was afraid to cook it.
A great round for home defense. It don't go much farther than 50 feet and it didn't penetrate two layers of normal drywall.
Of course, it's illegal here in California so I did my testing in Pahrump, Nevada.