Last summer I read David Silverman's Thundersticks: Firearms and the Violent Transformation of Native America (2016), which documents massive transfers/gifts of arms to Native peoples by the British, Dutch, Spanish, and French. I didn't take careful notes, but a while back I posted this to give a flavor of the sort of thing he documents (these don't all involve rifles, obviously):
1680s French sending 700-1000 guns per year to Natives on western Great Lakes
July 1693: New York supplies Iroquois with 90 guns
Sept 1693: New York supplies Iroquois with 57 guns
1700: New York supplies Iroquois with 400 guns
c.1700: Carolina gives Catawbas 50 guns
1706: Carolina trader gives 300 muskets to Chickasaws
1715: Florida given 1000 firearms, partly to outfit Yamasees
1715 Dec: Carolina gives Cherokees 200 muskets
1716 July: Carolina gives Cherokees 300 guns
1716: New France says 600 guns needed per year for Natives
1735: Georgia gives 600 guns to Natives
1736: Spanish at St. Augustine host 100 Natives, giving each a gun
1732: French at Mobile request 600 trade guns with brass mountings for Indians
1759: Louisiana earmarks 900 guns for presents
1759: Louisiana earmarks 600 guns for trade
And it goes on and on and on and on and on ...