Firearms and toolmarks 2

1) Describe polygonal rifling.

2) Describe conventional/cut rifling.

3) What rifling do you think would be easier to make an identification or elimination on?

4) Research what brands of firearms have polygonal rifling and which brands have
conventional/cut rifling.  Name three manufacturers who manufacture firearms with
polygonal rifling and three manufacturers who manufacture firearms with conventional
rifling.
Manufacturers who manufacture firearms with the polygonal rifling currently include
Glock, Kahr, Magnum Research and Heckler & Koch.

5) What are potential advantages to having a firearm with polygonal rifling versus
conventional rifling?

6) Name four different types of bullets (not calibers) and describe what they are typically
used for.   What are reasons a customer would choose this type of bullet over other types
of bullets?

7) When trying to identify these bullets, do you think that it would be more difficult to
identify/eliminate a lead bullet or a copper jacketed bullet and why?  (when approaching
this question, keep in mind that lead is softer than copper)

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