This guide details the process of modifying a Heckler & Koch G3 rifle to address its ergonomic shortcomings, particularly for left-handed shooters. Key upgrades include relocating the charging handle, installing a Spuhr adjustable stock and handguard, and mounting an Aimpoint CompM5 optic. These modifications, as demonstrated by experts Ian McCollum and Karl Kasarda, transform the G3 into a more modern and controllable platform.
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