Engineered for carry, the threaded Springfield Echelon 4.0C Pistol retains the key features of the full-size model, with a shorter 4.7-inch 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, offering a 15-round capacity with the flush magazine and 18 rounds with the extended magazine. FeaturesThread Protector IncludedOptics Ready(1) 15-Round Magazine & (1) 18-Round Magazine