Can you drive a non CDL commercial vehicle out of state with a k restriction?

You would need to specify your state in order to determine what the "K" restriction is. Restrictions are federally regulated, but restriction codes can vary by state. Any time I've seen a "K" restriction, it's been a restriction prohibiting the operation of a CMV equipped with air brakes (any vehicle requiring a CDL, regardless of weight class, is considered a CMV - a vehicle under 26,001 GVWR requires a CDL if it's carrying quantities of hazardous materials requiring the display of placards in accordance with CFR49 or if it's a bus designed to transport more than 15 persons, including the driver).

You seem to be under the impression that the "K" restriction is an intrastate-only restriction (and it may be.. again, codes vary between states, and I don't know your state). This only applies to CMVs, and not to commercial vehicles which do not require a CDL. So, in not so many Words, yes, you can operate the specified vehicle out of state.