"The suspects arrived at the Inland Regional Center at 11 a.m. on Wednesday, armed with the four guns and wearing masks. Chief Burguan said the suspects were wearing “tactical vests,” with pockets for spare magazines and other equipment. The two handguns that were recovered were bought by Mr. Farook, and all four weapons were bought legally, Chief Burguan said. A senior federal law enforcement official said the assault rifles were bought by a third person who is not considered a suspect. Officials said the two assault rifles were variants of the AR-15, the semiautomatic version of the military M-16 rifle; one was made by DPMS Panther Arms, and the other was a Smith & Wesson M&P model, a designation meaning military and police. The senior law enforcement official said one handgun was made by Llama, and the other by Smith & Wesson."