Not suggesting any changes, but, will note that one friend actually had the plastic safety button break to pieces on his early 590 before it was called the 590, years back, after who knows how many thousands of rounds, and it was replaced with a then custom metal unit made by someone he knew.

The safety screw is made to be unscrewtable, but can be done...tightest fitting driver, and something gritty, such as brasso on blade to help prevent slipping can help a great deal.

The milspec for shotguns often quoted by Mossberg simply states required attributes, has undergone numerous revisions over the years, but essentially specifies things such as gauge, that it have a metal trigger group, metal safety button, steel be parkerized, etc etc yawn.

The 590A1 was a specific contract answer to requests from several different, and at different times, user groups beginning with Navy and Marines, for a shotgun able to handle clanging into steel coamings and bulkheads during repel boarders, and ending up being found quite good on land for hard use.

Nowadays the Marines sold on the self-loaders, despite many finding them not near as slide-action easy to maintain, but, they also can find user groups saying they never break, wear out, and are nearly self-cleaning (sound familiar?) to support their purchase.

On the lubing, when looking at Glocks one day long ago (yep, here it comes, another side track onto Gaston'z Gunz, even if discussing Coke vs Pepsi), and noting them using a unique, unnamed, magical substance that, whatever you do, don't remove it when cleaning or the gun will explode!, (copper based anti-sieze) from the factory to prevent galling of small stamped stainless parts at sear/disconnector, I decided they might know what they were doing as for a better than average idea for a gun lube. Except, I could go them one better, because both copper and graphite based anti-sieze can cause/accelerate dissimilar metal corrosion in high heat/stress enviornments, I fell back on a non-corrosive high heat anti-sieze compound on hand, which is nothing but a really pure grease with value added micro-crystalline etc (ie paraffin for all the RenWax fanatics), and the unique additive being bunches of powdered lead, a little half pint tin weighing several pounds. As many know, lead is an extremely slick metal, and this stuff is great in various gun applications, the powdered lead smears into the surface as a lubricant plating that lubes long after run dry.

So, my Mossberg, of course, got the treatment. I generally tell folk with new Mossbergs to just squirt some oil or whatever liberally and run it for a bit before messing with a real teardown and quality lube job, as it will just be crapped out right off the bat by anodize from aluminum wear spots, oxide or parkerize from the steel, and of course the usual metal as bearing surfaces seat in an unpolished modern gun.

Hope the snow holds off, we have not seen any since last weekend, this week it was dodging tornados and baseball sized hail with 25-55 normal gusting winds.