This guide details the process of upgrading a Sig Sauer MCX Spear LT, covering the installation of a B5 Systems Enhanced SOPMOD stock, Magpul MOE-K2+ pistol grip, BCM vertical foregrip, and Slate Black Industries rail covers. It also includes the replacement of the muzzle device with a Surefire Warcomp and the addition of an Arisaka Offset Optic Mount with a Trijicon RMR. The video emphasizes a methodical approach to ensure proper fitment and function.
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