Last year Indonesia introduced their variant(s) of the licenced Russian “APS” under water rifle and cartridges.
Interesting to see that the licence for an outdated weapons was granted as the “APS” was replaced by the “ASM” which is also using different cartridges.
Little is known by now and it seems the Indonesians and there namely Pindad is making the cartridges with brass cases.
Note also the packing for the cartridges.
Image source: internet.