Need help knowing if they’re authentic

[SixHundred]

Hello everyone, i’ll be sharing the pictures of an S&W M&P 15 rifle and i need help identifying what I’m looking at here. It has 3 modes: AUTO, SEMI, and SAFE. I read everywhere that the M&P 15 doesn’t come in auto?!! (P.S this rifle is located in the middle east, not procured through official sources) (could it maybe be government/law enforcement?) or am i looking at a counterfeit?

Thanks in advance