Resident Evil Village weapon parts: how do weapon parts work? Almost all of the weapons in Resident Evil Village can be upgraded. How? By slotting weapon parts onto them. These are attachments which make your guns easier to handle and more effective in general. Some of these weapon attachments can only be found in the world of Resident Evil Village. They'll always be in difficult to reach spots or places you could easily miss. Other attachments, however, can only be bought from the Shopkeeper. With this in mind, it's always worth checking the Shop's stock after each significant story moment to see if he's got any new weapon parts for sale.