scar 17s; new owner

I'm new here and wanted to get some good info on ammo for my 17s in FDE. I was a little confused when I bought the gun as I know it is chambered in 7.62x 51mm but when I ordered it all of the websites said it was chambered in .308? My confusion is that I've been told by FNH directly themselves...

Before I go any further allow me to properly introduce myself. Hi, I'm SamuraiZero, I just recently separated from the marines (intelligence division, not infantry), and I own a stock SCAR 17s. Ok, so I'm not too new as I bought the gun almost 2 years ago now, but this is my first time on this...