No.
A bill approved by the Colorado House of Representatives but killed in the Senate in May 2024 proposed to ban the “manufacturing, importing, purchasing, selling, offering to sell, or transferring ownership of an assault weapon,” but it would not have outlawed guns already in someone’s possession.
The bill defined an assault weapon as a semiautomatic rifle that can be fed with a detachable magazine and includes other characteristics such as a muzzle brake. The bill also applied to .50-caliber rifles and semiautomatic pistols and shotguns with specific secondary features.
Ten states and Washington, D.C., restrict some semiautomatic weapons, according to the League of Women Voters. Most permit possession of guns obtained before the laws went into effect, while California and Illinois prohibit possession except in specific locations, according to the Giffords Law Center to Prevent Gun Violence.
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