Mossberg 590
Have an older Winchester 1300. There's a little flat metal plate on the underside of the bolt that the action bars hook into and holds the firing pin and spring in place. It's only held by a single screw. After every 100 rounds of slugs or buckshot, that screw would shear off, tying up the gun. After 3 or 4 screws sheared off, I had to weld the plate to the bolt. If the firing pin were to ever break, I'll have to buy a new bolt. It sits in the safe now. Can't sell it in good faith the way it is and don't want to spend the money to buy a new bolt to sell it. Don't know if current Winchester pumps are the same design. Loved the gun other than that. Nice smooth action, etc.
Have had a Remington 870 Express, lots of FTF, sent back to Remington twice, not fixed. Have had 2 friends with same model gun, same problem. I've heard Remingtons are excellent, but that's not been my experience.
Have a Mossberg 590, excellent so far except for a dirty action caused some FTF, worked great since I learned how to clean it thoroughly once in a while.
Good luck