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Original Articles

The examination, evaluation, and identification of 40 S&W calibre cartridge cases fired from 1079 different GLOCK semiautomatic pistols manufactured over a six-year period

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Pages 65-73 | Published online: 24 Apr 2014
 

Abstract

One thousand and seventy-nine (1079) pairs of fired 40 S&W calibre cartridge cases were obtained from the GLOCK Firearms Manufacturing Facility in Smyrna, Georgia over a six-year period and examined as part of their quality assurance program. The test-fired pairs included several pairs that were fired from consecutively manufactured slides and distributed geographically to three states in the United States. All of the cartridge cases were microscopically examined, evaluated, and intercompared by the authors using forensic optical comparison microscopy to determine if the fired cartridge cases could be individualized to themselves and to the exclusion of the remaining cases. The examination also involved evaluating each of the fired cartridge cases for sub-class characteristics.

Résumé

Mille soixante-dix-neuf (1 079) paires de douilles tirées de calibre 40 S&W ont été obtenues de «GLOCK Firearms Manufacturing Facility» à Smyrna, Géorgie sur une période de 6 ans. Ces douilles ont été examinées dans le cadre de leur programme d’assurance de la qualité. Les tirs d’essai des paires incluaient plusieurs paires qui furent tirées consécutivement et distribués géographiquement à trois états aux États-Unis. Toutes les douilles ont été examinées au microscope, évaluées et inter comparées par les auteurs par microscopie de comparaison optique afin de déterminer si les douilles tirées pouvaient être individualisées à elles-mêmes et être exclus des douilles restantes. L’examen, en même temps, inclut l’évaluation de chaque douille tirée pour des caractéristiques sous-classes.

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