Research & Education JFS Articles AAFS Connect Conference Proceedings Reference Series Library International Educational Outreach Program Firing Pin Aperture: Uncertainty of Measurement and Usefulness for Class Characteristics Session: General 2012 Smith, Erich D., Quantico VA; Seubert, Heather J., Quantico VA; Chavez, Theodore, Quantico VA; Lowe, Preston, Quantico VA View the paper General