本文对国内出现的PPK/S模型改制枪及其遗留在射击弹头、弹壳上的痕迹进行了全面系统的研究。对PPK/S模型改制枪的结构特点、工作原理和改制过程进行了深入研究,并且系统地观测、统计和分析了射击弹头、弹壳痕迹的形成机理、留痕部位和形态反映。为涉枪案件中PPK/S模型改制枪其射击弹头、弹壳痕迹的检验鉴定提供科学的依据。 This article has carried on the comprehensive and systematic research on the PPK / S model revamped guns and their traces left in the firing warheads and shells on the domestic market. The structural characteristics, working principle and reforming process of PPK / S model guns were deeply studied, and the formation mechanism, trace marks and shape reflection of the projectile bullet and shell bullet were systematically observed and analyzed. It provides a scientific basis for the inspection and appraisal of the PPK / S model gun revolver’s shooting warhead and cartridge shell marks in the case of a gun.