[Red in Blue PA]

What is the point of a mag fed shotgun which you have to pump?

Look at the Lynx 12. A Chinese made semi auto built on the AK platform.

The 590M is a joke IMO. Doesn’t even take Saiga mags. Uses proprietary Mossberg mags which are very expensive.

[Charles Martel]

I agree, the Mossberg and Remington shotguns featuring detachable box magazines are trying to steal a bit of the "tactical" appeal of the Saiga. Well, that, plus they're responding to some cheap imported detachable-mag shotguns (that otherwise looked like Mossberg or Remington clones) imported a few years earlier from Turkey or wherever.

I like the Saiga 12 and the other AK-based shotguns, but I still don't much care for the loaded weight of a box magazine for any of these shotgun designs. Maybe small-bore stuff would work well (and I think the initial efforts by Saiga were in .410 bore), but 12 gauge? Naah, I'll stick with the traditional boomstick.