12 Gauge, 2-3/4" shells only. The Typhoon 12 comes with one, 5-round box MAGAZINE, with round count holes in the magazine that make it easy to determine the number of rounds remaining. The magazine well and polymer magazine are unique to the Typhoon 12.
This is an AOW NFA items, please make sure it is legal to possess this item in your state of residence. a SOT is required for transfer