715T. It's nothing more than a plinkster that's been wrapped up to look like an ar.
They're made in Brazil, the 25 round mags are a real piece of work, while you're loading, you get to somewhere around 10 or 12 rounds and it because extremely difficult to add more rounds. I can't figure out if the throat of the magazine is just a hair wider than it has to be and the rounds slide around as if it were a double stack mag. All of that in conjunction with the fact that the magazine is actually composed of an upper assembly and a lower assembly, with the upper being all metal and the lower is all plastic, but some genius, decided to insert a small angel so they could make the 25 round magazine look like an AR magazine.
As I stated in another post, the peep sight and front post are beautifully made. They feel like machined aluminum and they're solid. If I ever get something with a long rail, I may just cannibalize those and put them on whatever new weapon I put together..
It' seems to be rather finicky about what kind of ammo you feed it. Just like the age old argument of "taste great or less filling", chevy vs. ford, ferrari vs lamborghini, usable ammo types will vary. I've read where lots of people have had luck with the hot cci rounds, which I happen to use a lot of in my pistol. I can't go 3 or 4 rounds without a stove pipe. I've tried Remington, Winchester, CCI, Eley and Federal, with the latter working the best.
I've polished the feed ramp and I clean my weapons after every use, unless specified by the manufacturer.
Also, when it comes to disassembling the rifle, getting the AR shell off is a few screws, no big deal, but once removed, dissembling the receiver assembly, you see just how cheaply made this thing is. The charging handle is actually a free floating piece, above the bolt, and is locked in to place via a tongue & groove, for the lack of a better description.
Other little idiosyncrasies: lots of mold flashing, the magazine release can be a little problematic.
On the plus side, when you find an ammo combination that works consistently, it's a fun little rifle, but results may vary.
I was hanging around at a mossberg forum for awhile and page after page of complaints, as well as everybody arguing which ammo would work best. All the crap I had problems with, others swore worked perfectly, conversely, stuff I've used, others couldn't get to cycle properly.
Every problem I see in the 715T is directly attributed to poor designs, poorer assembly & horrible quality control. Like I said, results may vary, but every one I've seen, held or shot has had a personality of its own.