Here's a new device to help keep us from hurting ourselves. It's designed to keep kids from shooting without cycling the weapon. Certainly is a novel approach to the issue. 'Safety Bullet' May Prevent Accidental Shootings - Miami News Story - WPLG Miami I think training and discipline would be better yet but that's just me. On a side note, I think you could modify these so you could climb like Stallone and his bolt gun!