An Arizona man who sold ammunition to the gunman who carried out the deadliest mass shooting in modern US history was charged Friday with manufacturing armor-piercing bullets without a license. According to court documents, unfired armor-piercing bullets found inside the Las Vegas hotel room where Stephen Paddock launched the Oct. 1 attack had the fingerprints of ammunition dealer Douglas Haig. A criminal complaint filed in federal court in Phoenix said Haig didnt have a license to manufacture armor-piercing ammunition. He faces the maximum penalty of five years in prison, and possibly a $250,000 fine, if convicted.  Paddock, 64, allegedly came to Haigs home in Mesa, on the outskirts of Phoenix, in September last year to buy ammunition. Haig had previously operated "Specialized Military Ammunition," an Internet business selling armor-piercing bullets, some of them high explosive, according to a statement from US Attorney Dayle Elieson of Nevada. Paddock killed himself after the rampage carried out from his hotel suite on Las Vegas famed Strip.