“Under the Militia Act of 1792, every citizen was REQUIRED to own a military-standard rifle, along with ammo, bayonet, and other gear.”
They were not.
No official US-issue infantry arms existed at the time. Formal adoption of specific models did not happen until 1795, when the M1795 Muskets made at Springfield Armory and Harpers Ferry Armory were adopted (two similar but not identical weapons, closely patterned after the French Modele 1763, which had been sold used, in quantity, to the fledgling US during AWI).
Both were 69 cal smoothbore, hence were not rifles.
The United States did not approve a standard-pattern rifle for issue to the armed forces until 1803.
Smoothbore muskets remained the dominant military small arm until 1855, when the 58 cal rifle-musket was approved for issue, firing hollow-base conical bullets developed from those invented by Capt Claude-Etienne Minie, a French army officer.
I stand corrected, thank you.