I’d say that DMLS can do that today - out of the materials you describe.
What you want is usually priced higher than your price point - Guild rifles with all that stuff run significantly more than $3.5K. The one outfit I know making a double square bridge Mauser receiver out of titanium is asking more than your price point for the action alone.
Price of printed objects would depend on the number of pieces, just as with all CNC production. Want one piece done on a CNC machine? The price is through the roof compared to a guy spinning handles on a lathe or Bridgeport. Want 100K pieces? Now there’s no contest between the technologies.
And cocking piece peep sights are just nonsense, BTW. Why would I want my rear sight to move? ;-) It looks trick and swank, but there’s little way to get all the slop out of the cocking piece and still have a reliable action. I saw a rifle awhile back with a rear quick-detach scope base that had a rudimentary flip-up peep sight, which I thought was quite functional. Hideously expensive, tho.