Remington based the 700 action off their 721 & 722 actions from the late 1940's. But as to what Remington's original actions were based off of, I believe it's off a combination of designs from the 1891 Argentine Mauser and the K98 Mauser action.Do you know which action Remington copied, I mean based their action on.? I read about it but I've forgotten as its been a few days ago...