Joe, interesting, considering we had 870's and threw many many rounds and loads through them... we had police models and also the new 870 military model with the changeable rear pistol grip/buttstock and barrel kit.
Tacticool. Nice weapons. The police model with the 14" barrels are especially nice- and if anything the 870 platform seems to be hailed by everyone else on the planet as reliable. As for the new military designation for their latest creation, I think the 870 MCS is probably one of the coolest high-speed setups I've seen in a long while, especially like this CQB M-4 w/870MCS attachment.:
Now if only Mossberg made one like it.:)
As for shooting off the barrel, it happened to two of us in one day. You'll have to forgive me, as I'm no armorer, but there are 2 sliding pieces that have a hook shape to them. They slide into the receiver during reassembly. I think its called the "Fore-end Tube Assembly", and somehow it interacts with the extractor. With my weapon, when the barrel flew off, I think one of those hook-shaped curve segments snapped, because when the barrel came off, it wasn't just the barrel. Those two long, curved pieces slid out with the receiver assembly group- together with the barrel. Something there broke, but I don't know what. On the same day, another guy had the exact same thing happen to him. From that day on, we were all thinking the Remington was a piece of crap. To this day, I still wonder if maybe the slide/mag cap wasn't threaded all the way... I dunno.
I did a search on the internet to see if there were any other reports of the same thing happening, and I didn't find any. I really can't believe it, but the only reviews on the thing are about how great it is. Personally, my experience is what it is, and I won't buy one.
By comparison, my 590 has been used to execute horizontal butt-strokes on heavy rubber dummies, covered in dirt, and fired in extremely cold and extremely hot weather, and I never had so much as a crack in it. Only complaint is I don't like the sling configuration on it. Its basically worthless.