Here's ShotGun News' article on it.
Here's the company that builds the PTR-91 PDW.
Two of the handguns we bought in November were Taurus Judges. Ammo for them is either .45 Colt (a longer-than .45 ACP) or .410 shells.
The 000 buck .410 shells only have 4 pellets in them - BUT they are each slightly larger than the size of a .38 bullet (.36 for the 000 and .357 for the .38).
Range time was awesome - at 25 feet, there were 4 horizontal holes across the center of the target with each shot.
