Signed up after running into this thread.
Bought a new Mossberg 590A1 after doing research on how this is the best since the military uses it. Well, after getting took it to the range and after ~75 shells it stopped feeding shells from mag tube into chamber.
Called up customer service and they advised that it was probably the interruptor and they send that out with the stop also. Received them and replaced them with the same outcome. Called them up and they send me a label to send it back to them. Send it to them and 1.5 weeks later called to see status of it. I was given a fedex tracking # and I was told that they replaced the interruptor and stop and they shot 20 shells and everything was working correctly. Uhmm, I did the same thing and the same outcome. Anyways, let it be and waited for the sotgun to come.
After it came, I gave it a try and fed couple of shells. To my amazement the shotgun does the same thing as it was send out. Called them to complain and had them give me a 2nd label to ship it back. How in the hell can they send out a non-working shotgun and claim to work 100% without checking it first?!
This has to be the most horrible experience ever buying anything... So much for buying something that is "reliable".