Okay, I am buying an '02 Vertical feed Autococker from a friend. The problem is, someone else told me that if an Autococker (and only Autocockers) has used Nitrogen, then it cannot use CO2. He said it would freeze, or something to that effect. Right now, I do not have a Nitrogen tank, and I can's afford one at the moment. He is not a reliable source, however, and I really need to know if this is true, or if he's just making stuff up.
This is the gun I am getting
This is the gun I am getting