While many "free states" like Pennsylvania do not have strict ammunition regulations, several others require ID for specific legal reasons:
Federal law requires purchasers to be at least for rifle or shotgun ammunition and 21 years old for handgun ammunition. Because of this, many retailers—especially "big box" stores like Walmart—routinely ask for ID to verify a customer's age, even in states with no specific ammo-tracking laws. States with Specific ID and Permit Laws show id to buy ammo
: Connecticut, Illinois, Massachusetts, and New Jersey require residents to show a specific state-issued permit or firearm ID card to buy ammunition. Identifying Methods and Variations California Ammunition Purchase Laws - LAX Ammo OC While many "free states" like Pennsylvania do not
: Also requires background checks at the point of sale, which necessitates showing ID. which necessitates showing ID.