This guide details the assembly of a custom SIG Sauer P365 pistol build, as demonstrated by Roger Barrera. It covers the installation of the Fire Control Unit (FCU) into an XMACRO grip module, the assembly of a Norsso R11 slide with a Norsso barrel, and the mounting of a Holosun 407K X2 optic and Surefire XC3-A weapon light. The process emphasizes using specialized tools like a Wheeler Engineering FAT Wrench for precise torque application and applying witness marks for security checks.
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