On April 28, 1995, Albert Petrosky walked into an Albertson's grocery store in suburban Denver, Colorado, and gunned down his estranged wife and the store manager. Armed with an L.A.R. Grizzly 50 caliber sniper rifle, an SKS Chinese semiautomatic assault rifle, a .32 revolver, and a 9mm semiautomatic pistol, Petrosky then walked out into the shopping center parking lot, where he exchanged fire with a federal IRS agent and killed Sgt. Timothy Mossbrucker of the Jefferson County Sheriff's Department. Petrosky, who was known to his friends as "50-cal Al," fired all four weapons, including the 50 caliber rifle, during his murderous rampage. ("Authorities Investigate Gun Sale: Rifle Used in Albertson's Slayings Wasn't Illegal," Rocky Mountain News, May 1, 1995)
Branch Davidian cult members at a compound in Waco, Texas, fired 50 caliber sniper rifles at federal ATF agents during their initial gun battle on February 28, 1993. The weapons' ability to penetrate tactical vehicles prompted the agency to request military armored vehicles to give agents adequate protection from the 50 caliber rifles and other more powerful weapons the Branch Davidians might have had. Four ATF agents were killed. ("Weaponry: .50 Caliber Rifle Crime," GAO Office of Special Investigations letter, August 4, 1999)
On February 27, 1992, a Wells Fargo armored delivery truck was attacked in a "military style operation" in Chamblee, Georgia, by several men using a smoke grenade and a Barrett 50 caliber sniper rifle. Two employees were wounded. ("Two Armored Truck Guards Shot," The Atlanta Journal Constitution, February 27, 1992)