The language on the 4473 is pretty specific. It asks if you have been judged to be mentally defective, or if you have been committed to a mental institution. Admitting yourself to a mental health facility does not make ineligible to buy or possess a firearm.
Thanks for the clarification. It has been over 30 years since I had one filled one out, and that was what the salesman told me. He asked the questions and I answered them and then signed it.