If they are the same design of action as the regulator, which I have, then none of the magpul furniture for 870s would be compatible without permanent modification.
I just measured the dovetail grooves.
The top of the dove tail is 0.430" wide
the underside and narrowest part of the dovetail is 0.406" wide.
The dove tail is 0.057" tall from top of dovetail to the flat top of the receiver.
The dove tail is approximately 6" long.
After holding the shotgun at eye level to take up a picture with the front bead, considering the low weight/high recoil of the shotgun, as well as the grip/tang geometry, I can tell you I would be seriously concerned about shooting this gun at eye level with any kind of optic. Laser pointer would be clutch.
Will do a range report as soon as I can get it out, but first impression this is an essential gun that every owner should have, but its a niche gun, suitable for bear defence, chopping firewood, meeting your daughter's boyfriends, stage coach robbery (if you had a time machine), Stage coach defense (same), coffee table piece/conversation starter, and short range 'instinctive' shooting.
The holster that some retailers sell with it is nice, but a molle style backpack mountable quiver would also be good.