Question: is there a specialist 5 rank in the army?
Answer: See, corporal is an enlisted level-4 rank, equal in pay to a specialist. This is a holdover from back in the day when the Army had two enlisted rank structures that ran side-by-side. There were specialists-4, specialists-5, 6, 7, 8, and 9. Specialists got the same pay as their noncommissioned officer equivalents.