HOUSTON, TEXAS - MAY 27: A boy examines a rifle at the George R. Brown Convention Center during the National Rifle Association (NRA) annual convention on May 27, 2022 in Houston, Texas. The annual National Rifle Association comes days after the mass shooting in Uvalde, Texas which left 19 students and 2 adults dead, with the gunman fatally shot by law enforcement officers. (Photo by Brandon Bell/Getty Images)

(AP) – The suspects in the shootings at a Uvalde, Texas, elementary school and a Buffalo, New York, supermarket were both just 18 when authorities say they bought the weapons used in the attacks. They were too young to legally purchase alcohol or cigarettes, but old enough to arm themselves with assault weapons. They are just the latest suspected U.S. mass shooters to obtain guns because of limited firearms laws, background check lapses or law enforcement’s failure to heed warnings of concerning behavior. The Buffalo suspect, for example, was taken to a hospital last year for a mental health evaluation, but that didn’t trigger New York’s “red flag” law.