This guide details the assembly of a Palmetto State Armory (PSA) Jakl upper receiver onto an AR-15 lower, creating a pistol build. It covers the installation of key accessories like a KAK flash hider, Streamlight weapon light, Trijicon MRO optic, and a custom trigger. The build emphasizes the Jakl's long-stroke gas piston system and AR-18 design lineage. Instruction is provided by an experienced firearm builder familiar with aftermarket components and platform mechanics.
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