A Guide to Blank Fire Guns WP4 Remington 1858 - 9mm blank fire WP5 Colt 1860 Army - .22 blank fire WP6 5 1/2" Colt Peacemaker 9mm WP7 Pietta Colt Navy - 9mm WP8 5 1/2" Colt Peacemaker .22 WP9 Pietta Colt Navy - 9mm WP10 Colt 1860 Army Conversion - 9mm blank fire WP11 4 3/4" Colt Peacemaker 9mm
