Here's a video I made showing how to take apart the Mosin Nagant model 91/30, m44, m38 etc. The cool thing about this bolt assembly is that you need no tools, this is a common design trait for old military rifles. If you plan on taking apart one of these remember to measure firing pin protrusion before disassembling and measure after you get it back together, if the firing pin protrudes too much it will rupture the primer of the cartridge (this can be very dangerous, resulting in hot pressurized gasses escaping the receiver).
Thanks for watching,
Here's a link to my previous article showing how to make the parts washer featured in this video: https://steemit.com/diy/@gunsmithing/easy-diy-project-small-parts-washer-quickest-way-to-clean-small-gun-parts