The stock firing pins are known for failure. Poor metal choice, dry firing, not correcting headspace, and incorrect cleaning are just a few of the reasons a firing pin will fail and usually at the worse possible moment.
The question is do you want to wait until your firing pin breaks or bends or replace it with one that won't fail?
New Bellm HD firing pins are made to last from S7 steel. S7 is a shock resisting tool steel with excellent toughness and high strength, along with medium wear resistance. It has maximum shock resistance and high compression strength, which gives it good deformation resistance in use, while retaining good toughness. An ideal metal choice for a firing pin, very difficult to machine without experience requiring a special heat treatment after machining. Precision manufactured to an incredible tolerance on swiss screw machines, our firing pins are not only a direct upgrade but virtually un breakable.