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Installing the Delta Ring Assembly and the Barrel Into the Upper Receiver

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This video clip demonstrates the installation of the standard mil spec barrel. It covers assembling the delta ring, aligning and torquing the barrel nut, installing the gas tube, and installing handguards. PDF instructions also available.

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WARNING: Never attempt to disassemble or reassemble a firearm unless you are absolutely certain that it is empty and unloaded. Visually inspect the chamber, the magazine and firing mechanism to be absolutely certain that no ammunition remains in the firearm. Disassembly and reassembly should follow the manufacturer’s instructions.

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