The Samson 3.5x Magnifier and Quick Flip Mount combo features the rotary actuated mount base and patented push button flip-to-side action. The Samson 3.5x magnifier features clear crisp high quality glass with excellent color preservation characteristics. The Samson 3.5x magnifier was specifically designed to meet the demands of high level operators and law enforcement professionals. At 35mm the magnifier accommodates a larger range of optics with greater light transmission and reduced edge distortion. If your mission profile calls for rapid transition between CQB and medium distance target engagement look no further than the Samson 3.5x magnifier and QR combination. You can own the best glass and the toughest flip to side mount on the market.