M1819 Hall Flintlock Rifle; photo by Antique Military Rifles on Wikipedia (use permitted with attribution / share alike).
Official State Firearm of West Virginia
West Virginia designated the Hall flintlock model 1819 as the official state firearm in 2013. All State Firearms
WV Metro News; "The firearm was produced at the National Armory in Harper’s Ferry by John H. Hall. It was adopted for use by the US Army in 1819 and was one of the standard firearms for US Army infantry all the way through the Civil War."