Walther produced a barrel that was specifically made to shoot the 8.2mm-9PT plastic training ammo. The barrel can be installed in any P5 (not the compact) without further modifications, and the blue plastic trainings ammo can be loaded in standard P5 magazines. It was however advised to remove one recoil spring to ensure proper feeding of new rounds. The barrel shown here was produced in 1993 (code KD). These training systems were shortly used by the Dutch police. A rare bird to find...