CH-
Thanks for asking. I love that little rifle.
The gun has well over 200 rounds through it with the standard Remington magazines. No jams.
I have not fired it with the other magazines yet. I wanted to be sure all the standard ones worked first.
Next trip to the range I'll test the other ones. The aftermarket mags don't have the bolt hold open feature, which is simply the follower rising up to stop the bolt.
I'm hoping they feed and function well. We'll see.
The stock is the 870 version with a little bit of filing done to the insert that fits into the back of the action.
The stock works very well and is comfortable on my hands and wrist.
I prefer this type of stock. Got a bit of arthritis in my thumbjoints from years of steering the big wheel. Job related body breakdown. Thumbhole and pistolgrip stocks usually just feel better to operate, for ME.
Accuracy out of this gun has been entirely satisfactory at the 100-yd. range with both 180&220gr. Remington ammo. The 220gr. shot about 3" higher and just as tight as the 180's.
I actually think the 220's are better. It's a wicked combo.
I've dubbed the rifle the "Gunwriters Nightmare":
Short bbl.
Big scope (not necessary).
Powerful round (common, too).
Two piece stock (synthetic to boot).
Autoloading action.
Detachable magazine.
Pistolgrip stock.
All black.
Everything a rifle shouldn't be to a purist.
Guess that says something...
I'd build another one in a heartbeat. Maybe .308, except the carbine is only available in .30-06.
Re the legality, it is legal without the 'flash suppressor/threaded bbl.'
Simply a hunting rifle. Going out with it again this year for deer season.
Good luck.