A Guide to Blank Fire Guns WP0 Bruni 5 1/2" Peacemaker, 9mm blank fire. WP1 Trinity style Colt Army, 9mm blank fire. WP2 Pietta Colt 1860 Army - Blank Fire WP3 Remington 1858 - .22 Blank Fire WP4 Pietta Colt 1860 Army - Blank Fire WP5 Pietta Colt 1852 Navy - Blank Fire WP6 Remington 1858 - 9mm WP7 Pietta Colt 1852 Navy - Blank Fire