That's what his design calls for. I believe if a good hard bolt with fine thread is used there should be no problem. The bolt would have to be hard so as not to undergo and flexing stress from the barrel-receiver interface. That is one of the reasons I recommended two alignment pins. To take some of the stress (weight) off the bolt as well as aid in aligning the nipple to the striker.
But hey, its a prototype. Improvements can always be added later. I think it has some nice lines. A very sleek profile.

While typing this and looking at the cut out I got another inspiration. This is getting back to the idea of a 209 ignition system. Instead of having the gap between the nipple and striker, one could utilize a system similar to the Genesis rifle but have the firing pin swing out from underneath rather than on top...hmmmmmmmmm That would seal off the entire area and make the rifle virtually weatherproof?!?!
Dang - I see an entire line of rifles coming out now. I can see it now. Semisane, CEO; Cayugad, Production Manager; Bronko, Quality Manager;, Muley, Janitor......hehehehe Oh yeah, we definately have to have Lemoyne as Sales Manager.