On to something genuinely dreadful. S&W 916, specifically the 916A.

In 1972 S&W bought a struggling shotgun manufacturer called Noble about 25 miles from their own Springfield, Massachusetts plant.
The objective was far from wholesome. S&W was working on deals with large police departments and their political overlords. In exchange for some lobbying and anti-2A knee bending, the departments would be required to purchase ALL of their equipment from S&W, rather than just their service revolvers. S&W had no difficulty supplying handcuffs, batons, holsters and clipboards, but they didn't have a shotgun in their lineup. Enter Noble. Their design was bad and quality was horrible, but it was a pump action shotgun.

They got re branded as S&W 916s, quality somehow dropped even further to save costs, and police departments around the country were force-fed this abomination for extortionate prices they were obligated to pay. Officers having to use this weapon quickly found it unreliable under even the best conditions, and extremely sensitive to any poor quality or high pressure ammunition. In particular the barrels liked to explode and peel open.

S&W was eventually forced to drop the model and the factory associated with it, replacing the 916 with the much better Japanese made 3000 series. Effectively a Remington 870 copy.