H-12 Weaponry in the Ariadna Supplement

Does anybody know where the descriptions for the Mk12 and H-12 Pistol, and the details on H-12 ammunition, are? The weapons appear in the Ariadna gear table, but only in the final version, and the Mk12 is in the v3.0 version of the gear tables from way back (using Normal ammo), but there’s no proper details section.

Have those entries escaped from the Yu Jing supplement or something?

I have the previews for all the released Infinity books, and I searched them all for the Mk12 and H-12 weapons. Mk12 has a few entries across a few books, but no actual descriptions. Same thing for the H-12.

Might be worth emailing support@modiphius.com to tell them about the missing entry?