Q: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Context: The Ak 5 or Automatkarbin 5 (''automatic carbine 5'', ''automatic carbine'' being the Swedish term for assault rifle) is the Swedish version of the FN FNC assault rifle with certain modifications, mostly to adapt the weapon to the Swedish climate.
Question: The Ak 5 is based upon what?
A:
fn fnc