My shotgun is a pump, so no gas system at all.
It has a straight stock just like an AR, so it pushes straight back rather than rotating upwards, but a one ounce slugs gives you a significant push.
As I see it, the 458 SOCOM offers box magazine reloads of a shotgun-like cartridge and bullet.
I get eleven rounds to start and ten more rounds from a quick reload.
It also has the same "manual of arms" for loading, clearing jams, safety, etc.
That's what attracted me to it in the first place.
This is also why I continue to be interested in it.
The thing is, I've never seen one in the flesh and never fired one.
On the down side, the cost of entry into the game is pretty high just to test it out.
The cost of ammo is also high, even if you reload.
That's how I see it. It's definitely "on my radar" but I cannot yet commit.