The Gen 2 Sig MCX Virtus
This guide details the process of changing the barrel and caliber on the Sig MCX Virtus platform, covering the transition between 5.56 NATO and .300 Blackout. It emphasizes the use of specific tools like a torque wrench with a limiter and highlights the importance of safety during disassembly and reassembly. The video demonstrates how the modularity of the MCX Virtus allows for quick caliber changes by swapping barrels and ensuring proper reassembly.













