A former Navy SEAL analyzes the SIG SAUER XM5 (MCX Spear), highlighting its advanced 6.8x51mm cartridge designed to defeat body armor at 500 yards. While acknowledging its impressive capabilities and ergonomic similarities to the M4, he questions its role as a direct replacement for the M4 carbine, suggesting it functions more as a battle rifle. The discussion emphasizes the trade-offs in weight and the importance of a family of weapons approach for diverse mission needs.
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