Originally Posted by Virginian
They look cool when the 105 pound Hollywood chicks blow the bad guys away with blanks. That's where they are best utilized in my opinion.
Unless you are hiding it in an extremely limited space, or have no intention of using it as an actual weapon, pistol-grips are entirely Hollywood. I mean, a collapsing stock adds like 5" to the gun over a PGO setup (seriously, with a PG most shotguns are like 30" long, whereas with a 13" LOP my 18.5" M590A1 was about 38" long--a collapsable stock will remove another 3" from that OAL for a collapsed length of 35". So, unless a 35" gun truly won't fit where you're hiding it, compactness isn't the big deal.
As far as compactness indoors. For that split second where you're passing through a doorway or rounding a corner, it isn't at all difficult to tuck the stock under the strong-side arm for the exact same compactness as a PGO setup. Then, you can immediately re-shoulder the weapon and have vastly increased ability to aim and shoot rapidly.
The only people who are really justified in using PGO setups are our military, but that's because they are only using a short-barreled version to blow open a door, after which they sling it and re-ready their M4s.
But, there are lots of people who just think they are cool or who have justified them in one way or another who will hate this post. But, spend some time over in "The Basement" of ShotgunWorld and you won't find a single person who has ever used shotguns for serious purposes advocate a PGO setup (except for door-breaching).