One of the most produced and fielded German Flak Guns, The 2cm Flakvierling was a light, vehicle towed Anti-Aircraft weapon. Designed in 1934, over 144,000 would be fielded until 1945. It's design ''flaw'' was that it had a notoriously slow rate of fire (120-rpm). Weighing close to 1,000-pounds, the frame was 14-feet long with a 5-foot barrel. It featured a 1-inch thick steel front plate to protect it's Crew (4) from small arms fire. The Flakvierling had a 360-degree turn radius and could traverse to 90-degrees. It fired a 138mm Shell (in 20 round Ammo Boxes). Ranging close to 5,000 yards, The Flakvierling was also mounted on various River Craft and also on Armored Trains.