All the performance of the UD Chassis, now with a Picatinny rear mount for instant-detach stocks and next-level ergonomics. The UD Picatinny Chassis refines the proven platform of the UD Chassis into a more practical, more adaptable option for the modern rifle owner. Ultradyne replaced the traditional buffer-tube interface with a robust, rear Picatinny mounting point so your buttstock detaches quickly for compact transport or tight storage without compromising repeatable return-to-zero.Ergonomics were a primary focus in our design. The chassis accepts the adjustable grip system so shooters can customize trigger-finger distance to their preference, and the adjustable thumb rest lets you tune positioning for repeatability and comfort. Ultradyne also added a dedicated spare-round holder location that keeps two extra rounds secure and accessible.Functionally, the Picatinny Chassis remains uncompromising. It keeps compatibility with mil-spec AR grips, accepts detachable AICS magazines, a...