Red orchestra 2 mods vietnam12/28/2023 ![]() The Type 99 Mark 2 Model 5, which further increased rate of fire, came too late to see full production or combat use, and was the last of the Type 99s. The Type 99 Mark 2 Model 4 Kai ("kai" meaning upgraded/improved, a change that does not warrant a new designation) increased the gun's rate of fire by swapping to a stiffer recoil spring. The Type 99 Mark 1 Model 4 and Type 99 Mark 2 Model 4 were a significant change to the cannon, a redesign from drum magazines to belt-feed the Model 4 was the final variant of the Mark 1, production ending in early 1945. The change in magazine is sometimes incorrectly stated to be the difference between the Model 2 and Model 3, however the larger drum was simply a parallel upgrade that came at almost the same time and is not actually related to the designation change both models can technically use either drum. The Type 99 Mark 1 Model 3 and Type 99 Mark 2 Model 3 were an upgrade to the Model 2 that swapped their compressed air cocking system for a hydraulic system, and they use 100-round drum magazines. ![]() The Type 99 Mark 1 Model 2 and Type 99 Mark 2 Model 2 are the initial production versions, fed from 60-round drum magazines. The Type 99 Mark 1 Model 1 is virtually never mentioned, even in Japanese sources, but is generally assumed to be the original Oerlikon FF Fs imported for study the Mark 2 did not have a Model 1 variant, instead starting with the production version. The two Type 99s being effectively the same weapon built at different scales, the guns also share development upgrades and sub-variant designations. They were the standard 20mm cannon of the Imperial Japanese Navy before and during World War II, mounted on many of their aircraft. The Type 99 cannons are a pair of related Japanese aircraft cannons derived from the Oerlikon FF series the Type 99 Mark 1 and Type 99 Mark 2 were developed from the smaller FF F and the mid-size FF L, respectively. Not to be confused with the Type 99 light machine gun.
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