Your local dealership is the best place to get a screw for the firing pin on a Sears model 42-103 19791-22cal sllr bolt action gun. Pawn shops often carry them too.
Numrich Arms
The Stevens 77C generally sells for $75-$150 depending on condition. We carry firing pins for this model (#77-77). sales@countrygunsmith.net
Recommend you see a gunsmith.
website for gunpartscorp, letter S, Savage, Model 73, and there is a parts diagram.
Worn parts, dirty gun. Not possible to diagnose it remotely, you need to see a gunsmith.
Remove the rear of the action by depressing the two buttons on each side of the action. The back and springs will all pull right out. Simply slide the cocking handle off the front of the bolt, and the entire bolt will come out of the back of the action. Remove the pin from the side of the bolt, and the firing pin will fall right out. Be careful not to lose the spring on the firing pin; they are difficult to replace.
1935
Try e-gunparts.com and Marlin
We make them, new. repair@countrygunsmith.net
www.leesgunparts.com I have new firing pins for that model. sales@countrygunsmith.net
The Ted Williams model 100 was a Winchester model 1894 rifle.Use this model to order a new firing pin.
50-150 USD or so