I'm looking for a tactical shotgun and I want to buy American so I'm looking at Mossberg. I like the 590a1 but I've heard Mossberg shotguns can be a hit or miss when it comes to their quality control area. Is this true? And I also noticed that even when the barrel is tightened down by the magazine tube end cap there is still some movement with the barrel in the receiver. Is this how it's supposed to be? I was looking at the Ithaca 37 Defense but they seem kind of hard to take down and none of the gun shops around me can order them. I had a Rem 870 but I really didn't care for it. Nothing wrong with it, just didn't like it.