This video details the unboxing and assembly of a custom AR-15 build, combining a Griffin Armament Mk2 upper receiver with a Geissele Mk8 13.5-inch M-LOK handguard. The process includes disassembly of the original components, installation of the Geissele handguard, and a pin-and-weld procedure for the muzzle device to achieve legal barrel length. The completed rifle, featuring an Aimpoint T2 optic and Surefire light, is then tested at an indoor range.
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