The Department of Justice (DOJ) announced a proposed rule for defining gun sales. The rule would close background check loopholes during sales.

The Department of Justice announced two new steps to help address gun violence in the U.S. The department issued a notice of proposed rulemaking and published model legislation to help states craft their own “extreme risk protection order” laws, sometimes called “red flag” laws.

A new program in Alabama would enable administrators of schools without an SRO or security officer to keep a firearm in a secured safe on campus for use during an active shooter event.

An additional 55 to 63 people have been murdered each year in Missouri following the state’s 2007 repeal of its permit-to-purchase (PTP) handgun law, which required all handgun purchasers to obtain a license verifying that they have passed a background check.

A divided federal appeals court struck down California’s concealed weapons rules on Tuesday, saying they violate the Second Amendment right to bear arms. By a 2-1 vote, the judge panel said California was wrong to require applicants to show good cause to receive a permit to carry a concealed weapon. Judge Diarmuid O’Scannlain wrote for the majority that “The right to bear arms includes the right to carry an operable firearm outside the home for the lawful purpose of self-defense.”

A California lawmaker proposed legislation Monday to make background checks and gun registrations requirements for anyone who builds plastic firearms, dubbed “ghost guns,” on a 3-D printer at home. The bill, by state Sen. Kevin de Leon (D-Los Angeles), would also apply to anyone who buys parts that can be assembled into a gun, Fox News reports.

2013 was Colorado’s busiest gun-buying year on record, partially due to legislation that now requires background checks for private firearm transfers, The Denver Post reports.

A federal judge ruled Tuesday that New York’s expanded ban on assault weapons and high-capacity magazines was constitutional, but he struck down a provision forbidding gun owners from loading their firearms with more than seven rounds, which he called “an arbitrary restriction” that violates the Second Amendment.

The First Florida District Court of Appeals ruled Tuesday that colleges and universities have no vested or delegated authority to regulate firearms on campus – only Legislature has that authority, according to a report from The Examiner.

The U.S. House approved Tuesday a 10-year extension of an existing federal law banning guns that can go undetected by metal detectors and X-ray machines, such as plastic guns.