Is it illegal to sell body armor and/or ammunition?
Different states have different laws on whether an individual may buy body armor / types of protection.
Also, California is close to approving legislation that tracks all ammo purchases, ie: a registry.
RE: “Is it illegal to sell body armor and/or ammunition?”
In re: body armor, not sure whether or not illegal, but many places won't sell to anybody who isn't provably LEO (Mateen having an armed security ticket may have so 'qualified'). As far as ammo goes, no, not illegal...
the infowarrior