Trainwreck. Just search this forum for "Mossberg Night Train, and start reading. You'll find few voices raised in favour of these. You'd be far better off saving your money for something good. Watch the EE. Don't be in a hurry to buy, just see what's available and how much it costs, get an idea of what budget you'll need.
Keep reading the threads in here, a recent one discussed .308 vs .223, and as a .308 shooter, I do know my next rifle, whenever that happens, will be a .223. Don't get me wrong, I love shooting .308, and expect to be doing so for some time to come. It's just that I'm not blind to it's minuses as well as it's plusses.
The .223's far longer barrel life, cheaper to reload, less recoil: works for me.