This section covers the assembly of the ejection port cover, the forward assist, the charging handle, the A1 sight and the A2 sight. We’ll provide you with some helpful tips and methods for function checking each subassembly as you build your upper receiver.
You can watch only those clips that pertain to your specific rifle and skip the others if you choose.
Now that you’re ready to start building, it is important that you follow the order of assembly; this will avoid interference of parts, eliminate rework and allow for proper and cumulative function checking.
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