The Stakeout (or as the common people call it, a Tac-14 or Shockwave) is a different animal than a regular shotgun. Its like the difference between an AK and an AR. They are used in a different manner and from each other.
First a discussion on the traditional use of a Shotgun with a bead. The stock and mount are crucial. Sports Shotgunners take great pains to fit their stocks because the stock places the face and the eye in the same place every time...hopefully anyway. The eye is in essence the rear sight...and the bead is the front sight. This works well enough unless you are shooting an extremely tight pattern...or slug rounds.
With the Stakeouts, the rear sight...ie., the stock, is missing. And what happens is that Tac-14 (yes...I am going to use the words...Stockless Shotguns) users will always tend to shoot high. The reasons are two fold. One is the desire to keep the pistol grip lower than the face. Two is the way the stockless shotgun recoils (see the videos), back and down. Third is the tendency to look over the bead. The stock not keeping the eye in place, the stockless shooter will tend to over shoot the target.
If one is aware of this, the bead can work if the shooter forces himself to keep the ass end of the shotgun up where his eye is.
A best practice for us has been the use of the Red Dot (we prefer the Trijicon RMR). Properly zeroed, an RMR equipped Stakeout keeps up with any stocked shotgun. In class we have taken head shots out to 15 yards with tight patterning buckshot and consistently hit with slugs at 100 yards.
But not everyone wants an RMR on their SSGN (Stockless Shotgun). When we worked up the Alaskan Package for a customer he wanted rifle sights. Rifle sights are simpler than an RMR...that is true, and slightly less expensive.
The rifle sights give you the important rear visual index point just like a pistol and in experiments and testing, we were able to duplicate what we do with the RMR Stakeouts...just slightly slower. In short, you have the same sight picture as your pistol, and that makes great sense.
Why not the popular Ghost Rings everyone has on their shotguns? With a stocked weapon, the rear ghost ring works well since the face and eye are always in place to see through the rear ring. Without a stock, the ghost rings are far slower than the traditional rifle sights and RMR.
This SSGN concept as seen in the Stakeouts, The Tac-14 genre, is far more than a close range hip shooter. It is an extremely compact and useful tool capable of a broad range of duties and assignments as long as the sighting system allows for such deployment.