The new 3.7 cm Flak 43 was a dramatic improvement over the older models. A new gas-operated breech improved the practical firing rate to 150 RPM, while at the same time dropping in weight to 1,250 kg in combat , and mere 2,000 kg in transport. The barrel was shortened to 89 calibers. It was also produced in a twin-gun mount, the 3.7 cm Flakzwilling 43, although this version was considered somewhat unwieldy and top-heavy. Large-scale production did not start until 1944 and about 7,216 were produced by end of the war (Zwillings included, each counted as two guns). Item No 02347 Item Name German 37mm Flak 43 Zwilling Bar Code 9580208023472 Scale 1:35 Item Type Static Kit Model Brief Length: 160mm Width: 99mm Total Parts 150+ Metal Parts n/a Photo Etched Parts 1 piece Film Parts n/a Resin Parts n/a Total Sprues 7 sprues Released Date 2014-05 More Features "The kit consists of over 150 parts ,includes a piece of Photo Etched parts - Details finely represented by newly tooled parts"