Great for the price - Samson RAM-3XM-SMAG 3.5x Magnifier 3.5x35mm Obj Black

Was either the Holosun or the Samson Magnifier. I went with this one because it locked when using it. Magnifier has been out a couple of years now but I think it's still good. The glass is clear and durable super easy to get attached and tighten down. Make sure to Loctite the screws and your good to go. Blasted through 500 rounds and it held up. It is not the lightest magnifier out there but with its proven track record you know it will last. Now mind you I do not have a range to shoot at 200-300 yards, but this gives you the ability to ID targets at longer distances. Overall a good buy and I do recommend it.