Finished! After working on this thing off and on for 4 years, it's finally done. Some parts I should have changed before making the final molds, and they tore in some unfortunate places because of it, but I at least got the one gun out of the molds. I can probably get a couple more, but they'll need a lot of work to clean up some of the rough spots.
Solid resin cast body, hammer and cylinder cast separately.
There's about 4 or 5 things I would change or improve if I wanted to do it again, but I've made 3 versions of this thing over the last 6 years and I'm pretty sure I'm done with this gun.