Main Menu > Assembling the Upper Receiver: Section 4 > Installing A2 Sights
This video clip demonstrates the assembly of an A2 rear sight. At the end of this clip we demonstrate the alignment of the 300 yard zero. 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.