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The Guntec USA AR-15 Buffer Tube is a T6 6061 aluminum pistol buffer tube with ambidextrous one-point sling adapter included. An extra-wide castle nut, 3-ounce CAR buffer, upgraded chrome spring and a dense slip-over foam pad are also featured.

See more at http://guntecusa.com/index.php?route=product/product&product_id=162.

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