PA24 has it nailed.

Reminds me of an early snap forearm 2nd generation AE-Grade 20-gauge my Father and I beat a hasty retreat from about 45 years ago. We answered an ad in the Seattle Times. Guy said he'd gotten the gun for his wife to go pheasnt hunting with him and had it bored out so she could use 3-inch shells. She didn't like it because it kicked too much!!!