-Buffer Tube Milling File (intended to shave down the best of the AR-ten Buffer tube so which the charging tackle can clear on some higher/reduce combinations) The GG3 generates loads of aluminum chips and you don't want stray chips ending up at the rear of the spindle. In actual fact, https://ghost-gunner-379999.blog4youth.com/33480265/the-smart-trick-of-ghost-gunner-3-that-no-one-is-discussing