I inherited a 28/.410 Pigeon Grade Lightwieght 101 that my father had. 27" barrels. 2 3/4" chamber on the 28 and 3" chamber on the .410. The 28 ga. has choke tubes and the .410 is choked mod. and full. It's basically a 28 gauge Winchester 101 Pigeon grade with an extra set of .410 barrels. It's the smallest frame they made in the 101 I believe.