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 optics mounting system, it might just be the best. Built around Springfield's patented Central Operating Group (COG), a serialized chassis that serves as the "skeleton" of the gun, the Echelon offers unmatched customization. You can easily switch between small and medium grip frames, turning the Echelon into a compact or subcompact pistol with optional slide/frame combos (sold separately and available soon). What truly sets the Echelon apart, however, is its red-dot mounting system. Unlike most pistols that require separate adapter plates, the Echelon utilizes the "Variable Interface System" (VIS), a pattern of holes in the slide that accommodate Shield RMSc, DeltaPoint Pro and RMR optics footprints using included hardware no plates, no hassle. This unique system allows the optic to sit lower, enabling co-witnessing with the factory tritium U-notch iron sights, which offer optimal luminescence for quick target acquisition in all lighting conditions. Additionally, the Echelon stands out with fully ambidextrous controls, making it ideal not just for left-handed shooters but also in case you ever need to use the pistol with your off-hand. Thoughtfully engineered and delivering on every front, the Echelon addresses common issues that have plagued other designs. While others may have introduced these features first, the Echelon executes them best. It's truly one of the most well-thought-out pistols in years. 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 flat dark earth for a modern tactical aesthetic