Willybuch, I think the 5/8x24 threading is due to the calibre being .308 unlike the .223 threaded at 1/2x28. Can someone confirm this?
Just got one as well... I'm totally obsessed right now. I've only just started to get the scope dialed in, so I can't say much - but I love the rifle so far!
https://www.dropbox.com/s/u1eeiai389ad0nj/IMG_0765.JPG
https://www.dropbox.com/s/0sk16yltcb28j86/IMG_0767.JPG