So son, the widget goes here behind the do-hicky. Next you wind the what-a-ma call-it. Be careful not to over wind as you might break the coiled metal thingy. Once you have all that memorized you are considered a qualified gunsmith.
"Got this from a gent name of Turtledove. He said you put a thing called a 'clip' in here and you can fight all day without reloading. What will they think of next?"