Excellent condition Surefire M600DF with the DS-SR07-D-IT switch and cap for running your external IR laser like a DBAL. This has only been on a rifle that has sat in a safe and never even been in the field. Looks brand new and functions perfectly. I parted out most of the rifle and this accessory is no longer needed. I don't have the box for it any more. What you see is what you get. Was over $500 when new. Open to trades for a basic Leupold 3-9x40 or $200 cash. I'm located in Leander, but get to Austin during the weekdays. Text is best 210-3two8-one88four