I contacted Sig, they said the box labels were marked incorrectly.
That being the case, I would recommend buying the standard Xl and purchasing the RED DOT down the road, Holosun or Romeo. We all know electronics fail at some point and when this Romeo does I will be SOL.
Those parts can be purchased through our Customer Service Department at 603-610-3000 and use option 1 to speak with a Customer Service Representative. Hours of operation are Monday-Friday between the hours of 8:00am-5:30pm Eastern Time.”