Just finished about 3 hours of making a firing pin for an 1889 Marlin rifle. Boy oh boy! The pin itself is not bad at the front but the rear is an odd shaped retractor that is quite complicated. You can't just fit a new tip to the pin as the cut outs for the lever don't give enough meat for the insert to hold. Below is a picture of the pin while I am cutting the clearance cuts with a ball nose end mill. If anyone needs the dimensions for an 1889 firing pin I have them... Now.