Ambrosius Gemlich, ‘Double-Barreled Wheellock Pistol Made for Emperor Charles V (reigned 1519–56)’, ca. 1540–1545, The Metropolitan Museum of Art

German, Munich; L. 19 3/8 in. (49.2 cm); L. of upper barrel 10 in. (25.4 cm); L. of lower barrel 7 5/8 in. (19.4 cm); Cal. of each barrel .46 in. (11.7 mm); Wt. 5 lb. 10 oz. (2550 g)
http://www.metmuseum.org/art/collection/search/22387

Image rights: The Metropolitan Museum of Art (Gift of William H. Riggs, 1913), licensed under CC0 1.0 Universal

About Ambrosius Gemlich

German, active 1530, based in Munich and Landshut, Germany

About Peter Peck

German, 1503-1596, Munich, Germany