Capacity wise; kel tec ksg. But it’s a pump action. Two magazine tubes. Each tube can hold 6 shells of 3 inch, 7 shells of 2-3/4 inch, or technically 11 shells of shorty shells such as Aguila or federal.
The weak spot in the components, as shown in by TFB, is the 2.5 mm Allen head hex screw that holds the magazine tube selector, from the factory they don’t have threadlocker on it. It’s just grease or oil on there. That’s how it failed the 500 round burn down test. It walked out on them, detent pin and spring popped out, the selector tube was not able to switch or hold its position for the selected tube since there was no longer tension, but also it caused feeding issues.
Luckily my KSG didn’t have that screw walking issue but I didn’t try to shoot it 300-500 rounds in one session; at most 50 rounds per session. I have already had a total at least 500 rounds by the time they came out with that video years later.
However, after watching the video, I put a small dab of blue loctite on it after degreasing; just as a preventative measure and doing my own quality control checks.
The lower pic rail is a polymer rail, since I added a vertical foregrip, I reinforced it by buying an aluminum rail by hi-tech cc, blue loctite the 8 set screws for the 4 aluminum dimpled lugs they included to hold the aluminum rail in place. I think this aluminum rail is essential mod since the KSG does not like to be short stroked or babied; need to rack with authority, like you own it, to prevent feeding issues. I also added a pistol light in front of the vertical grip as a secondary preventative just in case hand slips if wet; but also easy access for illumination.
