OH SB59

Exempts "qualifying firearms" (portable rifles, shotguns, pistols, revolvers designed for single-person use) and ammunition from Ohio sales and use tax, excluding firearms with barrels larger than fifty caliber or shotguns larger than ten gauge

Creates the "constitutional commerce credit," a refundable tax credit for small arms and ammunition manufacturing projects that create jobs in Ohio, with credits capped at $10 million per fiscal year

Requires manufacturers seeking the tax credit to invest at least $2 million in capital and maintain operations at the project location for at least 7 years or the credit term plus 3 years

Allows tax credit agreements for up to 15 years, with credit amounts based on a percentage of "excess payroll" (Ohio employee payroll above baseline) determined by the Tax Credit Authority

Authorizes clawback provisions requiring manufacturers to refund up to 100% of credits received if they fail to meet job creation, payroll, or investment commitments or cease operations early