On the subject of kick;
When the MG first came out, I read a review in a Harris publication--by Mas Ayoob, I believe. He mentioned that a SWAT team was shooting at the range, and gave the Mountain Gun a whirl. Their response went something like, "First shot, bullseye! Second shot--'Me, flinch?' "

His point was that the MG was a "carry a lot, shoot a little" gun, with full-house loads anyway. Mileage, of course, varies.