Use a Marlin 57 firing pin. It's the same rifle, just re-branded for Sears.
There were two types of firing pin used on that model. Would need to see the bolt, but we have the pin. gunshop@nctv.com
Numrich Arms
Believe that is a Marlin 101. Contact Numrich at their website- gunpartscorp. They list that firing pin for $5 plus shipping,
You can find a replacement firing pin for a Stevens model 87D 22 cal rifle at a gun dealership. You can also find it by contacting the manufacturer.
gunpartscorp website has a cross reference to find the originial make and model, and usually his firing pins.
No
The Ted Williams model 100 was a Winchester model 1894 rifle.Use this model to order a new firing pin.
Best left to a gunsmith
Your rifle is a Marlin 25M. You can check with Marlin Customer Service, expect price to be AROUND $25 plus shipping.
www.leesgunparts.com I have new firing pins for that model. sales@countrygunsmith.net
To remove the firing pin from a Winchester Model 100, first ensure the firearm is unloaded and safe to handle. Disassemble the rifle by removing the stock and bolt assembly. Once the bolt is accessible, locate the firing pin retaining pin or screw, remove it, and gently slide out the firing pin from the bolt assembly. Reassemble the rifle by reversing the disassembly steps.
gun shop, e-gunparts.com, gun shop