Kawanishi J3K/J6K for FDM printers

Adapted from the N1K-J models by @Captain_Ahab_62
The Kawanishi J3K was a concept fighter developed in parallel with the N1K1-J land-based fighter. It was to be armed with two 30mm Type 5 cannons and two 13.2mm Type 3 machine guns. The concept, however, was abandoned early on as efforts were focused on the N1K-J. It would be developed into the J6K fighter.

The J6K was a further development of the J3K fighter, being initially equipped with the same armament. An improved engine was fitted, and the concept reached a mockup stage (represented by the Mk II model) before being dropped in favor of Mitsubishi's A7M fighter. A further development resulted in a heavily-armed interceptor (the Mk III model) with six (!) 20mm Ho-5 cannons in the outboard wings and two 13.2mm machine guns. The two Type 3 machine guns were moved inboard to the wing root and synchronized with the four-bladed constant-speed propeller.