Trijicon type 1 6.5moa RMR. I have had this mounted on my G19 for 800 rounds plus carry time with zero issue. It has always held zero and never flickered with the Battle Werx Plate. It was used when I bought the G19 so actual round count is in known. There are some minor scuffs to the finish where it was mounted and on the edges from carry. $275 plus shipping PayPal , cashiers check, money order or Credit Card plus 3.75% for processing fees.