Yes it is legal in most instances to travel with your NFA firearms (those sold by a class 3 dealer and often referred to as TItle II firearms). You will have the same restrictions as traveling with a normal firearm but also need to comply with the regulations for interstate travel with a NFA firearm. For more information on transporting NFA firearms across state lines see our ATF Form 5320.20 page.
Remember that they need to be legal in your destination state.