Barrel Extension Lug Marks of the M-16 Assault Rifle and Its Comparison Value

This report will introduce, investigate and verify a specific set of barrel extension lug marks found on fired cartride cases from the assault M-16 rifle, caliber 5.56 x 45mm. These class and individual characteristics have not been previously documented in professional literature and are introduced for the first time for use by firearm examiners.

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