This is a used .30 Cal Phantom LT/LTA Q.D. THM-4302 Mount that is threaded 5/8x24. I have probably used it for less than 100 rounds of subsonic 300 blk. It is used but it is in excellent shape. Retails for $88.00 I will take $67.00 shipped. I will ship priority mail. Payment by discreet paypal or money order.