Hello bajtársak and fellow forumdwellers,
Please hear me out! I know full well how everyone feels about copy-pasted guns, however we are already scrapping the barrel with Japan.
As most of you are well aware, the standard for BR4 semi-auto rifles has become a 10 round detachable magazine with at least 15.3 damage. Out of all the great powers, Japan invested the least in semi-automatic rifle development and only managed to produce some prototypes before the end of the war with all of them failing at least one of the criteria.
To be precise Type 4 mass-production did start but Japan surrendered soon after with few guns being produced (just had to put it out there before a gun nut corrected me).
The ZH-29 is the most straightforward and logical gun for the Japanese faction.
Japan´s ally, Siam purchased ZH-29 rifles from Czechoslovakia in the 1930s.
Japan had captured and even copied the ZH-29 (Type Otsu rifle in game, sadly stuck with only 5 round mag and low damage) from Chinese soldiers.
China had both imported and locally produced unlicensed copies of the ZH-29.

Records of the Northeastern Three Province Arsenal, also known as Shenyang Arsenal, showed that the prototype rifle produced at the plant was successfully tested and ready for mass-production but the “918 incident” delayed the process and the records ended with the Japanese capture of the factory.
It is not known how many were produced, if they were produced at all afterwards, however we do have photographic evidence of a ZH-29 from the Nanking puppet regime’s arsenal.
It is not known if the bipod was unique to Shenyang produced rifles or was fitted later, upon further inspection, the bipod design seems to obscure or replace it, which most likely had to be done in the factory. Regardless the bipod should be a feature to make it slightly different from the variant in the Axis tech tree.

Sources:
China’s Small Arms of the Second Sino-Japanese War (1937-1945) - Shih, Bin
RIA: Japanese ZH-29 Copy by Tokyo Gas & Electric - Forgotten Weapons
Small Arms of The World - A Basic Manual of Small Arms - W.H.B Smith
- Yes
- No (I have another rifle that fits the criteria)


