The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.
If you're trying to achieve, there will be roadblocks. I've had them; everybody has had them. But obstacles don't have to stop you. If you run into a wall, don't turn around and give up. Figure out how to climb it, go through it, or work around it.
我不害怕失败。我不害怕冒险。