Can anyone identify this gun?

.22 (I have no idea what I am talking about, but everyone posts it).

It does look like a small caliber like a .22. It is also obviously a hunting rifle with a scope aim, not an actual sniping rifle. The silencer makes it look a lot bigger than it really is. It's not an M1 though that's for sure. Nor an M4 :)

I did some digging around, and it certainly looks like this air rifle.