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In the last 60 days he bought four weapons legally at two Colorado gun shops, the authorities said. The weapons included an AR-15 assault rifle, a Remington 12-gauge shotgun, and a .40 caliber Glock handgun, said Chief Oates, and all three were believed to have been used inside the theater.
Through the Internet, he also bought more than 6,000 rounds of ammunition: more than 3,000 rounds for the assault rifle, 3,000 rounds of .40 caliber ammunition for the two Glocks, and 300 rounds for the 12-gauge shotgun.”