Anderson AR-15 lowers no longer mil-spec?
By Patrick R
It appears that Anderson has made the decision to change the thread depth on their AR-15 lower receivers so that they will not accept the standard 1″ grip screw found in every mil-spec AR-15 lower in America. In the photo below you can see that the grip screw hole is not threaded the whole way […]
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Source:: The Firearm Blog
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