Go with the model weapon featured on the front page of the LZ below the title. Use the grenade launcher - against rabbits & squirrels.
Deer hunting is one shot-one kill. If you don't have the shot you don't take it. I go bow hunting and I have to get within 30-35 yards. Do I wish I had an automatic arrow flinger? Yes, but that's beside the point. When I do gun hunt, I use an M1 Garand, iron sights, no scope. It's a semi of course, but I'm only going to fire once.
Why? Is there a debate going on between you and a hunting buddy? You get my vote as being right, Dennis. In the end, it's what's in your freezer that counts not what's in your gun locker.