Introducing the Sling Blade Trigger for the Smart Parts Ion marker. Features:Unmatched speed and reliability. Ergonomic shapeRoller bearings provide that smooth consistency every player is looking for. Adjustable for trigger pull length, over travel and tension.Note: Items marked with double asterisks (**) are special ordered items requiring an additional 2-3 days shipping time and will ship separate from the rest of your order. Expedited shipping (Next Day Air, 2nd Day Air) is not available on items with double asterisks (**).