AMAZING COLLECTION OF WW2 GERMAN ANTI AIRCRAFT GUN ROUNDS Who knew there were so many different types of rounds for the WW2 German Flak 38 anti aircraft gun? If you look closely you can even see there a wooden one made for training! The Flak 38 was a 20mm calibre, single barrelled gun which had a range of 2,200m and a firing rate of 180 to 220 rounds per minute - depending on how quickly the 20 round magazines could be ejected and reloaded by the five man crew of course. Designed by Mauser, it w