Visit the original page for more detailed instructions. I used any screws and bolt I could find to assemble it. Be prepared for a lot of sanding. I used plastic boxes/trays to emulate the spring as the original poster suggested. I don't even remember where I found the 41. rimfire STL so I can't link it but if you leave a comment I'll add it to this post. Also the photo is a placeholder. THIS DOES NOT FIRE REAL BULLETS IT CANNOT BE USED FOR THAT BECAUSE OF THE PIN.
The author remixed this model.
I modified the Hammer to include the stirrup. It's less accurate to the original but it should print better. It'll be hidden inside the body anyway. I also fixed some normal issues with the bodies top bolt holder things, and the right grip. IT CANNOT SHOOT REAL AMMUNITION DO NOT ATTEMPT.