The email issued mentioned earlier this week is now fixed! You may also have received previous emails that were meant to be sent over the last few days - apologies, this was a one time issue and shouldn't happen again!
The contract for the USMC rifles was only 3000 or so. All were 722 actions. The Army 722/40X and 700/40XB's were made in larger numbers. That is why the price difference. anything USMC marked also seem to be in greater demand. People will pay for the stamp.