(CNN) - After witnessing two of the deadliest mass shootings in U.S. history, Colorado is expected to pass a series of gun control laws Wednesday.
Gov. John Hickenlooper will sign three bills into law Wednesday, his office said. The new legislation includes:
- A 15-ammunition limit on magazines;
- A universal background check for prospective gun buyers; and
- A requirement for gun purchasers to pay for their own background checks
Colorado's most recent mass tragedy came last July, when a shooting rampage at a movie theater in Aurora left 12 people dead and 58 injured.
In a 27-second call to 911, at least 30 shots can be heard as the gunman roamed the theater, shooting randomly as people tried to scramble away or cowered between seats.
Federal agents said suspect James Holmes began buying guns two months before the attack. He allegedly built an arsenal of two Glock handguns, an AR-15 rifle, a shotgun and 6,295 rounds of ammunition.
Colorado was also the site of the 1999 massacre in Littleton, where two students at Columbine High School killed 13 and wounded 23 others before killing themselves.
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