22lr bolt

grabcad

I was thinking about how simple I can make a close bolt semi-auto gun, so I came up with this bolt group for 22lr. It uses a firing pin as an ejector because 22lr is rimfire this is possible but I haven't seen it yet, it doesn't need an extractor as well because it is a direct blowback which means the case pushes the bolt back and doesn't need an extractor to pull the case out of the chamber. It would be cool for a drone-mounted gun or something similar, but I'm currently more interested in designing useful firearms in real calibers.