+1
Seconds to all comments about pistol grips and hard to shoot and useless past near contact distance. And I put the funky vertical foregrips in that useless category as well. The "floor sweeping" shotgun is just another myth. All shotguns need to be aimed/pointed reasonably, , and those two accessories do not help with that at all.
Where space is at an absolute premium, the old Remington top folder stock seemed a good compromise. Folded, it stored well, unfolded, it shot OK. Still, Nearly useless when shot folded.