This call indeed is from FrontSight Firearms Training Center of Pahrump, NV--only its out of their Los Angeles CA affiliate marketing center - promoting specials.
They are a legit, above the board, company and you can asked to be removed from their call list. You only get these calls if you previously purchased or joined one of their products or services.
Just got a call from 213-260-9796 3 times today. They are FrontSight and they are legit. I called the number back and got the same message. I looked them up on the internet and found an alternate number. I called them and asked to be removed from their call list. They said that they are having problems with their system, and they were apologetic. About 10 minutes later I got another call and they have an option of pushing 3 to not get anymore calls. Did it and hopefully it worked.