I have been building AR platforms for some time.
Now I'm moving up from the .223 / 5.56 to 308/762.
So what the I'm looking for is some sort info on what lower & upper to start on ans why.
Welcome Linegod, we have several members that are currently building. They may be more informative on what they chose and why. Some of there threads are below. Some even gave a complete build list.
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