You need to be more specific. What 1915 model?
You need the services of a gunsmith.
At a good gunsmith's shop. Maybe Numrich's Gun Parts (search gunpartscorp) For the complete trigger guard assembly, including trigger, safety, springs, pins etc., you can get it from Numrich, Midway USA, Brownells or direct from Marlin. If it's just the trigger or other individual trigger guard parts you need, you'll have to get those from Numrich for a different model Marlin.
The Stevens 1915 Favorite is not a pump-action rifle. It is a single-shot. First we need to figure out which model you actually have. sales@countrygunsmith.net
Disassemble to do what? To remove the trigger group you need to push out the two pins in the receiver to remove the trigger group. To remove the bolt you need to take the barrel off which requires an armorers barrel wrench.
Brownell's; you need to talk to a gunsmith
Go to gunpartscorp.com where they have thousands of parts. Search for what you need.
Make, model, condition. We need all 3 factors.
You will need to get it lettered by S&W
I would start by checking with numrich gun parts corp.They can be found on the web.
I would start my search at numrich gun parts corp.They can be found on the web.
The Need of Money - 1915 was released on: USA: 28 August 1915