There it is, Remington 700, it was annoying me all day, I watched several YouTube vids on polishing patterns into the actions couple years ago, that's why it looked familiar. The rifle the FBI claims to be 'the' rifle appears to a Remington 700, apparently chambered in .308. There is a fictitious rifle used in fantasy games referred to as an M308 but it's a generically used term based on the search results returned.
It's not an update as much as it's more disappointment.
Is he one of the South Park writers by chance?