Exposure to lead-free frangible firing emissions containing copper and ultrafine particulates leads to increased oxidative stress in firing range instructors. - McNeilly, Ryan J.; Schwanekamp, Jennifer A.; Hyder, Logan S.; Hatch, John P.; Edwards, Brett T.; Kirsh, Jacob A.; Jackson, Jerimiah M.; Jaworek, Thomas; Methner, Mark M.; Duran, Christin M. (Particle & Fibre Toxicology, 2022)