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. With the same length barrel as the AOW version, this version includes a Mesa Tactical adapter with Shockwave Blade brace to meet the 26" overall length requirement to be classified as a firearm.
This is a non-NFA item, and does not require a SOT to transfer.