I thought barrels had to be at least 18 1/2 inches? Oh well, anyway, I' d consider it marginal. Also, check your state laws. Most carbines chambered for pistol rounds hold 10 rounds. Some states won' t allow hunting with any weapon that holds more than 7 rounds.

If it' s legal where you' re at, I' d still keep the shots to 25 yards or less.