Good things come to those who wait and while the Echelon may not be the first polymer pistol to feature a modular design, night sights and an optics mounting system, it might just be the best. Like the SIG P320, the Echelon is built around a serialized chassis called the Central Operating Group (COG), which serves as the "skeleton" of the gun. This allows for full customization with small and medium grip frames, enabling you to convert the Echelon into a compact or subcompact pistol with optional slide/frame combos (sold separately and available soon). Unlike other serialized chassis systems, the Echelon's COG is incredibly sturdy and rigid, providing an impressively robust housing for the operating system. The Echelon also sets itself apart with its red-dot mounting system. Most modern pistols require adapter plates to fit a variety of optics, adding unnecessary weight, cost and hassle. The Echelon solves this with the "Variable Interface System" (VIS), a pattern of holes in the slide that accommodates Shield RMSc, DeltaPoint Pro and RMR optics footprints using included hardware no adapter plates necessary. This system positions your red-dot significantly lower, allowing for co-witnessing with standard-height iron sights, including the factory tritium U-notch sights that ensure fast target acquisition in all lighting conditions. Additionally, the Echelon features fully ambidextrous controls, making it ideal for left-handed shooters and useful if you ever need to use your off-hand. Thoughtfully engineered from top to bottom, the Echelon is one of the most innovative pistols we've seen in years, solving common issues in ways other designs haven't. While others may have introduced similar features first, the Echelon truly excels in delivering them best. 4.5 Inches hammer-forged steel barrel with durable Melonite finish for enhanced corrosion resistance The stainless steel Central Operating Group can be customized with other frame/slide combinations (sold separately), allowing you to transform the Echelon into a subcompact or compact pistol Features a Variable Interface System (VIS) for mounting a wide range of red-dots directly to the slide without the need for adapter plates The VIS system accommodates popular red-dot footprints like Shield RMSc, DeltaPoint Pro and RMR using the included locking pins and screws The deep optics cut allows your red-dot to sit lower, enabling co-witnessing with the iron sights Equipped with a tritium dot front sight and U-notch rear sight for rapid target acquisition in low-light conditions Billet-machined slide with melonite finish offers exceptional durability and corrosion resistance Fully ambidextrous design magazine release buttons are accessible on both sides for left or right-handed use Also comes in olive drab green for classic military styling