Springfield ECT9409B-3D: Engineered for carry, the threaded Echelon 4.0C retains the key features of the full-size model, with a shorter 4.70\" threaded barrel and compact frame for enhanced concealability. Its revolutionary Variable Interface System provides unmatched direct-mount compatibility with today\'s leading red dot sights, complemented by tritium three-dot irons for fast target acquisition. The serialized Central Operating Group is housed in a compact frame. Includes a soft case, 15rd capacity with the flush magazine and 18rd with the extended magazine.