Well, fellows - full disclosure!
I bought a Gen 2 9mm SUB2000 last week, and was just kinda looking for others' impressions. I had been looking at them for a while, but the version that takes M&P 9 mags seemed a little hard to find at a decent price. I finally found one!
So, MY impressions:
This is a really slick little range toy! I'm impressed with the workmanship, and it sure folds into a nice little package for a backpack, or under-the-seat stowage in the car. Heck, you could almost fit it into a [big] coat pocket! I've run about 200 rounds of various FMJ, TMJ, and JHP's through it so far with nary a hiccup. Ammo included bullet weights from 115 to 147 gr., including about 1/2 box of 147 gr. Ranger 'T's, and a box of aluminum-cased Blazers, and I'm not really a fan of anything but brass-cased ammo.
Accuracy was outstanding at about 35 yards. My only real 'complaint' is that I can't get a good cheek weld due to the geometry of the gun, combined with the fact I'm a pretty big guy. With muffs on, forget it! I had to switch to earplugs to be able to use the sights at all. You can't really put higher sights or optics on it without interfering with being able to fold it up. Even with that handicap, though, my 6" steel targets were dead meat at 35 yards! I'm thinking maybe a small laser on the bottom rail would be a worthwhile addition.
There was a little bit of a learning curve with the takedown/field strip and reassembly, but I got past that in short order, and I'm comfortable with it now. If you should happen to get one of these, read the manual carefully BEFORE you attempt to field strip it. Important lesson learned! Specifically, DO NOT attempt to take it down without it being cocked, and do not drop the hammer while it's disassembled!
In summary - I love this little carbine! Wish I'd bought one a long time ago!