I was wondering why I am given plans for weapons I am to low of level to use also how do I get back the 1st slingshot
Bad game design, (or Redesign) but you can use them as a goal to work towards.
Not currently possible to get back to the original slingshot. The Dev team is working on it. Their first attempt to give us new sets of crafting plans for the original weapons didn't work.
yeah once you craft a new weapon with your old weapon there is no getting your original weapon back