AR15 MAGNUM SACK CAMO GRY 40INMagnum Sack AR-15 - 40" - Camo Gray - Silicone Treated Protects firearms & othervaluable gear against rust, dirt and scratches. The cotton's natural wicking ability continually draws moisture off the weapon making them ideal for year roundility continually draws moisture off the weapon making them ideal for year round storage.storage.