The ultimate in home protection, or demolition. 16 rounds of semi automatic 12 gauge power. Manual rotating magazine holds four 2 3/4 inch shells in each pot. Shoot four rounds, rotate the mag, and theN shoot the next four, and so forth until the mag is empty. Then drop the mag and insert the next. 21 inch barrel, and just a shade over 36 inches in total length makes this terror pretty compact. Comes with two 16 round magazines.