Non-restricted.
Some are finicky about ammunition.
Accuracy is actually pretty awesome out of the box out to 100 yards, takes some practice past that.
Magazine capacity for them is a big who knows grey zone gong show right now.
A lot of them are being only sold with 10 round stick mags that are retarded, barely able to pull them out of the mag fell and fit no magazine pouches of any sort properly.
For a right handed shooter manipulation can feel ass backwards compared to a real AR, I'm a lefty so its just gravy for me.
Carry handle models quite often the optic mounting rail that is included is off center and will NOT line up with the bore no matter how much you try.
If you do get one, may sure it is the flat top version to avoid those headaches.
Don't over tighten the screws taking it apart to clean it, they will strip in the plastic shell "M4" wannabe body.
Do not bend the recoil spring taking the action apart, getting parts through Mossberg warranty center in Canada is a nightmare.
Mags will fit a standard AR pouch but are just a little tight on some, I use a tactical tailor vest but I like how they hold snug and my vest has its own dump pouch for shotgun shells so no problem for me.
The 25 round magazines can be found but you have to search high and low for them and most people who have several do not want to part with them.
The rifles prefer round nosed ammunition, cheap stuff like Winchester 333 hollowpoints which have a flat nose jam all the time in mine, I stick to CCI Minimags, Blazer 40gr lead round nose, Federal Champion Bulk 525 packs 36 grain round nose hollow points and CCi Stingers when options are limited.
Here is mine after I chopped the useless carry handle off it and clamped on a NcStar AR15 scope riser in its place, scope lines up perfectly for me now and the perm indents in the plastic body from tightening the screws hard make sure it returns to zero every time I take it apart.
Painted it with olive drab krylon spray paint and its got a "battle worn" finish to it now, mine has far too many rounds through it to even bother keeping track of but it doesn't act up often for me, when other shoot it they manage to make it jam but it wont for me anymore.
Any other questions? Ask away.