You may have noticed that Springfield Armory has sprinkled some extra nomenclature to all of their Echelon handguns (referred to as 4.5F models meaning full-size and a 4.5” barrel). The rationale for this is that they have had something under wraps that was on the way, and it has finally arrived. The new Springfield Armory Echelon 4.0C 9mm handgun is here.