The GRS Riflestocks Aluminium & Nylon Bag Rider & Rear Bag Combo is a premium, specialized support kit engineered to maximize rifle tracking stability and recoil consistency during long-range precision and prone shooting. The system combines a heavy-duty, low-friction bag rider shoe that slips onto the stock's rear Picatinny track with a purpose-built, malleable rear squeeze bag. By creating an elongated, perfectly smooth tracking surface, it eliminates friction catch and allows the rifle to glide seamlessly back into the shoulder pocket upon ignition, absorbing recoil uniformly. This combination allows marksmen to make micro-elevation adjustments by simply squeezing the bag with their non-shooting hand, shrinking group sizes and establishing a rock-solid rear foundation.