The only potential charge that kept nagging at me until late today was the one about possession of a dangerous weapon by a person under 18 (a misdemeanor).
941.28 is about the possession of a short-barreled shotgun or short-barreled rifle. Hence, it does not apply to Rittenhouse.
29.304 is about restrictions on hunting and use of firearms by persons under 16 years of age. While some people might claim he was hunting I can’t imagine his activities met the legal definition of hunting. Hence, this section does not apply to Rittenhouse.
29.593 is about requirements for certificate of accomplishment to obtain hunting approval. I’m certain hunting licenses are not being issued by WI fish and game for the state terrorists. Hence, there cannot be issue with any failure to acquire a certificate to get approval for a license.
Hence, the “possession of a dangerous weapon by a person under 18” charge is bogus.