I used to be a 12ga. guy for SD, but since I bought (and shot a lot) an 870 EXP 20 ga., with factory installed Knoxx Spec-Ops stock, I'm a believer. 2 3/4" #3 buck seems to be very mild, with one heck of a punch. Three of my friends have purchased this gun after shooting mine. I have only seen this gun for sale by high volume Remington dealers. 18" barrel, Cyl bore w/two shot extension. Order # 81180. I am sure you can find it for sale by other Remington dealers, but around the Atlanta area, only the big Rem dealers have it. Otherwise you can build it up yourself. Felt recoil seems very reasonable.