Nuttinfancy broke a new mossy on camera, My buddy Johns wouldn't feed and jammed shells, i wore one out goose hunting, the plastic dogs that replace the 2nd pin on the trigger group wore from cleaning, my gunsmith said don't clean it so much, but that's hard to do when you're using it hard and its not only a range gun. I carried an old Wingmaster on the job for years and i had no doubt it would work. The mossy is more serviceable by the average joe and is a good piece. At the end of the day though there are more 870 shotguns in the hands of LEO, armed guards and soldiers than the Mossberg even though the Mossy passed the mil spec test and the 870 failed.The 870 is the all steel, the Mossberg is actually an alloy tank. I purchase, repair, restore and sell 870 as a hobby( there's no money in it but its fun) so i know the shortcomings of the 870, especially with the new ones but there easy to fix. One thing i know for sure, you don't see many Mossbergs from the 60's floating around but there are a ton of 870's. Can you beat a successful track record? I vote no.
Ya, I see your point. But Remington is a MUCH larger company than Mossberg. Their flagship rifle the 700 is most popular rifle, the 870 most popular shotgun, they make pistols/1911's , manufacture premium ammunition, and much more.
I'm sure Remington 870 are in more use in LE, etc, etc.....but THEY HAVE A BUDGET, and when Remington fills an LE contract I'm sure they get a nice price. Every single of my 870's have given me an issue. My 14" M590A1 and other Mossies have not. Mechanically the 590A1 is better, sorry. Sure the receiver is aluminum, but all steel trigger group, controls, etc.
The dual extractors and heavy duty solid ejector V.S. Remington's single extractor and pinned springy ejector and not as tough or durable. When the action gets all gummy, the Remmy might have failures to extract a spent hull, while the Mossy kicks them out with authority a solid 5 feet away, and with force.
The Mossgerg M590A1 is priced so right. Your getting a $1,000 shotgun for $650-$750 NIB.
The finely tunned Remington 870 Police Max And Wilson Combat/Scattergun Tech 870's Are very good shotguns indeed, but on design principals the 590 is superior to the 870, especially any entry level Express. I own my grandfathers circa 1968 Wingmaster blued, polished chrome bolt, 30" bbl fixed full choke, gold bead sight, white mid bead.....I wasn't even born and my Nonno was bucking shots out of that Wingmaster with my 15 year old father and now it sits in my gun vault

flawless operation...flawless. Just replaced the mag spring and extractor spring and it's like brand new. I'm taking it out this Sunday for Father Day with my pops at Silverdale to do some trap shooting clays
But any day of the week....I'll take a NIB Mossberg M590A1 14"/18"/20" with Ghost Ring sights and SpeedFeed Stock (4 rounds) over an 870 without thinking of it. I own a factory 14" but I'd take the full size 20" Ghost Ring sigh, 9-shot defender for general use