This is the firing pin for the Winchester 1894 lever action rifle. It fits all calibers. Note: Winchester made 2 types of firing pins for the mod 94. To circa serial # 15,000 1894 calibers 32-40 and 38-55 used the type 1. The difference between the two types was the end of type 1 was not beveled. It was a strait cylinder. Winchester received complaints because the non-beveled end can cause the locking bolt to jam when it catches on the bottom of the firing pin when the muzzle is elevated and gravity causes the pin to slide to the rear against the firing pin stop pin. You will still find that a lot of the old 94's still have the type 1 firing pin. The best thing is to replace it with a type 2. If not you need to have the muzzle lower than the stock before using the lever and inserting a new cartridge. This allows the firing pin to slide forward so it does not jam.