Quote Originally Posted by gunnerblue View Post
The 7600 series were big game hunting rifles based on the design of the 870 shotgun. The one's that you were looking at are the police versions (synthetic stocks, ghost rings, etc) also based on the police-style 870's.

The 7600 series is still very popular with hunters in PA since semi autos have been banned for hunting until very recently. My grandfather hunted with an older 760 Gamemaster for most of his adult life and I remember it being finicky with certain loads and prone to not cycling easily. The 7600 has a redesigned lug arrangement that made it much more reliable.

As far as the AR15 mags, they typically don't feed well in bolt action rifles- not sure if they would in pumps, either.

For $550 I'd buy one in .308 to have an extra lightweight hunting rig. IIRC, they are four-round mags.
Bigger mags were available for police use; a buddy I've lost touch with who was career Military Police then civil LE was a big fan of these in his duty days and looking for more of those mags.