Striker, Streetsweeper and Protecta shotguns (South Africa)
The original Striker shotgun with 12 inches barrel. Note the winding key at the front of the cylinder / magazine, and the top-folding butt (folded)

The US made Streetsweeper version of the Striker shotgun, with 18" elongated barrel to comply with US firearms laws.

The Protecta shotgun, with the butt unfolded. Note the ejector rod located along the barrel, and the lack of the cylinder winding key, which is not required in this design