GC_UPC Diamondback DB15 AR-15 5.56 NATO Rifle 12" M-LOK Hand Guard $599.00 DB15CCMLB show more like this 19.95 Cheaper Than Dirt GC_UPC Diamondback DB15 5.56mm NATO 36in Black Anodized Semi Automatic Modern Sporting Rifle - 30+1 Rounds $679.99 DB15CCMLB show more like this Free Shipping Over $49, Free In-Store Pick Up SPWH GC_UPC DIAMONDBACK DB15 $846.99 - show more like this 7.99 Guns.com