The KRYTAC Gen 2 Compact Carbine Stock is the same stock that is included with the TRIDENT Mk2 PDW-M. Update your original TRIDENT PDW with the latest version stock! You can also use this with the rest of the TRIDENT lineup, as well as the WAR SPORT LVOA and BARRETT REC7 series for a more compact solution to the original KRYTAC buffer tube and battery stock.