In January, a man armed with a 9-millimeter MAC-10 with an extended magazine, a gun prohibited under state laws, massacred 11 people and injured nine others at a Monterey Park dance studio where ...

A closer look at the MAC-10, the semiautomatic gun that law enforcement say was used in a mass shooting over the weekend that killed 11 people at a Monterey Park dance studio.

The gun he used was not a machine gun. MAC-10 variants include the Cobray M11/9, ... However, the suspect in this case is 72 years old and the ATF trace indicates he bought the gun himself.