AFTE Store - Consecutively Manufactured Ruger P-89 Slides

Ten consecutively manufactured Ruger P89 pistol slides and one frame were acquired from the manufacturer for examination and testing. The slides were mounted on the frame and test-fired to obtain cartridge cases for comparison. Breechface marks on the test-fired cartridge cases were compared for class and individual characteristics that resulted from the manufacturing processes. The parallel striations evident on each test-fired cartridge case were a product of filing of the breechface. Granular detail exhibited by some of the test-fired cartridge cases was a result of bead blasting of the slide; tests from two of the slides display marks that correspond to burrs found around the periphery of the firing pin aperture. It was found that the slides can be identified based on these breechface marks.