In November of 2024, Colorado created a 6.5% state excise tax to be paid by vendors on the sale of firearms, ammunition, and firearm precursor parts to consumers located in Colorado. The excise tax does not apply to wholesale sales or sales to peace officers, active-duty U.S. military personnel, and law enforcement. The provisions of “Proposition KK” are codified at Colo. Rev. Stat. § 39-37-101, et seq.