Given the choice between the Kel-Tec KSG and the KS7 I put the KS7 way ahead.
The only real advantage of the KSG is the double magazine system. which is off set by the more complicated design, the weight and bulk, and the more difficulty in loading it. Since the KSG has two magazines you have to direct shells to the correct magazine.
The KS7 is a much simpler more mature design with less weight and bulk, and is much easier to load since the KS7 has guide rails so the only place the shell can go is into the magazine.
As for the Bullpup design, it has a lot to offer.
Overall it's actually slightly shorter then the Remington and Mossberg Shockwave type guns, and unlike them, it can be fired like a long gun with a butt stock for better control, and unlike those types, the Kel-Tec's have a full 18 1/2 inch barrel.
It can be handled easily with one hand unlike a standard long shotgun, and unlike the Shockwave type guns, the Kel-Tec's can be fired with one hand if needed for the first shot.
This makes it possible to maneuver around a house and open doors while having the gun in a ready to fire position.
This isn't possible with a standard long gun and the Shockwave types are too unbalanced to hold in a shooting position unless you have bodybuilder arms.
Bullpup guns have always had poor trigger because of the long linkage from the trigger back to the sear and hammer.
Kel-Tec solves this with a unique design that puts the sear and trigger up font, with only the hammer at the rear. So, the Kel-Tec's have the best trigger in any bullpup firearm.
Both my KSG and current KS7 have triggers as good as most any pump shotgun.
If you don't like the carry handle, Kel-Tec sells a conversion kit to install a KSG rail in place of the carry handle so you can mount any sight you want.
The KS7 seems to be the best in class for a bullpup pump shotgun, being less expensive and simpler then other designs.
Due to bad shoulders I couldn't handle a standard pump gun so first I tried the KSG, then after handling one I upgraded to a KS7.
Like a lot of new things it may not be for everyone and may take a little getting use to, but it certainly paid off for me.
As an added advantage, the Kel-Tec's "Usually" handle the 1 3/4 inch mini-shells.
This give a lot more rounds and very low recoil that almost anyone can handle.
I would caution to shoot enough of them to verify reliable operation.
Nothing says "Get outta my face" like a shotgun and the bullpup may well be the the future of home defense shotguns.
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