Main Menu > Assembling the Upper Receiver: Section 4 > Assembling the Upper Receiver Introduction
This video clip introduces the order of assembly for the upper receiver and the tools needed. 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.