Engineered for carry, the Echelon 4.0C retains the key features of the full-size model, with a shorter 4-inch 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 U-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.The Viridian RFX-11 Micro Reflex Green Dot Sight was designed from the ground up to ensure clarity, solid function, and rapid target acquisition. The RFX-11 will be ready when you need it, featuring two night vision modes. The RFX-11 is the perfect optic for your pistol in any light condition. The RFX-11 fits on most subcompact optics ready pistols that use the shield standard footprint. FeaturesIncludes 4 MagazinesIncludes Pistol BagIncludes Viridian Green Dot Sight Pre-Installed