Before you can craft an item, you should see what materials you'll need to craft it. You can check what an item is crafted with using the
The assault_rifle requires that you are at least level 9 and have 1x metal, 1x metal_spring and 2x rifle_body. Once you have these items in your inventory you can craft an assault_rifle using the
Some items are able to be recycled for materials, you can check if an item can be recycled with the
item command. If you want to recycle the item, just use the
You can see all items a materials can be used to craft with the
item command, ex.
t-item metal would show all items metal can craft: