What is the Tupperware stock? Is this the cheap one? What is the Duramax stock? Is this the Accustock? Is the 6br boltface the same as a 308 boltface? Is there a list anywhere of the letters behind the numbers of Savage rifles? I looked for 6br and on the Savage site they had 4 but when I Googled them I was finding some that had magazines and the ones on the Savage site were only single shot rifles. Was I looking at last years models? Thanks for reading this.