This work explains to lawyers presenting evidence in court and others, all aspects of the examination of firearms. Each aspect of firearms and ammunition has strong evidential value, but the technical aspects of the evidence can be confusing to the non-expert. The book offers a detailed examination of scientific techniques and key issues. Questions such as the distance away from a target that a weapon was fired, whether the marks on a particular bullet can be said to categorically prove that it was fired from a particular weapon or whether an erased serial number can be restored are covered in accessible terms. The technical specifications and characteristics of common weapons are also discussed, together with a plain explanation of specialist terminology and advice on the cross examination of expert witnesses.