Bought my last Mossberg last year. Bought a turkey gun. Patterned it and took it on a 2 day hunt out of state. The safety locked up. Took it apart and it was put together without the detent ball, just the spring. Spring got wedged under the safety. Pulled the spring and kept my thumb on the safety the rest of the trip holding it in safe.
Called Mossberg QA and asked them to send me a detent ball and I would fix it. They told me it was a restricted part! Said I would have to send the gun back. Wrote a letter to the CEO expressing my outrage and asking them to send me what is essentially a ball bearing. Head of customer service called me. Said it was a restricted part due to safety and I would have to send the gun back. I offered to sign a full waiver. They said no.
I bought a pack of loose ball bearings on Amazon and fixed it myself. Last Mossberg I ever buy. I can buy any part I want for my Glock or CZ and replace it, but Mossberg screwed up my safety and wouldn't send me a ball bearing.