Pistol build

 Would work. 

 Be dam handy thing to know, if you start with mags as well. 

 Sweet work Pauly, gonna be fun watching you devolp and fine tune the pistol. 

 Got a name brewing for it? 

I still need to make a pellet tray and figure out the best way to attach the breech to the main tube, but everything fits together really well and the cocking is really positive and feels great using cap screws instead of a pin. 

I have figured out I need to make the actual hammer longer so the screw is further back, as how it is now, the probe won't travel back enough to load the pellet. the extra size of the cap heads cause this.  All in the name of product development.

I am planning on this being a straight pull bolt with a lockup mechanism. If I was making a revolving bolt that you lift and pull, I would need a meatier breech so that 90 deg channels could be cut into it to lock up probe for firing.

I used a 32mm round wood routing bit to form the bottom of the breech to fit the main tube. 

The stainless is really good to work with and my tooling seems to handle it well. The hollow probe comes out really well and I seem to be able to make them quite easily now, especially with the mill. I use the end mill to form the hollow part by plunging down and this comes out nicely with just a little bit of filing required. The mill also ensures a proper 90 threaded hole in the probe for bolts, and in this case a cap screw for the cocking lug.