Could this potentially be a naval version ETC gun, since there was some talk awhile ago about ETC gun research for tanks and SPGs.
From the barrel, it doesn’t look like a rail gun or coil gun, so if it’s not just a larger caliber naval gun then the most likely candidate would be a prototype naval variant of an ETC gun originally developed for 155 SPGs.
From the barrel, it doesn’t look like a rail gun or coil gun, so if it’s not just a larger caliber naval gun then the most likely candidate would be a prototype naval variant of an ETC gun originally developed for 155 SPGs.