Despite rave reviews from other Valley law enforcement agencies, the Avondale Police Department is dumping its arsenal of Glock handguns, saying they are prone to jams that could jeopardize officers or the public. "It's a significant problem," Police Chief Stephen MacKinnon said. "It was a safety issue for the public." Most of the department's .40-caliber semiautomatic Glock pistols were purchased 12 years ago. The department's firearms experts have determined the slides that eject spent shell casings have become worn and may not work properly. If they malfunction, the shell will not eject properly and will create a jam when a...