1. The beginnings -- 2. Firearms legislation and the definition of a firearm -- 3. Marks and microscopy : the emergence of a new science : firearms manufacturing processes and their implications concerning the Daubert challenge -- 4. Mechanisms and design aspects of firearms -- 5. Internal ballistics -- 6. External ballistics and cartridge loadings -- 7. Terminal/wound ballistics and distance firing -- 8. The scene of the shooting incident -- 9. Examination of exhibits at the laboratory -- 10. Presentation of evidence to the courts -- 11. Proof marks and the proof of firearms.