Browning Hi-Power Full Custom in .40 S&W with .357 Sig Conversion
This guide details the modifications and components of a custom Browning Hi-Power Mark 3, originally chambered in .40 S&W and converted to .357 Sig. It covers slide and frame enhancements, specific sights (Trijicon HD, Heinie Mil-Spec Ledge), a KKM Precision barrel, trigger profiling, beavertail installation, safety modifications, and Cerakote finish. The guide also emphasizes the critical differences in magazine feed lips for reliable .357 Sig feeding and the structural advantages of three-lug .40 S&W/ .357 Sig barrels over two-lug 9mm barrels.











