The Firearm Blog tries the smallest and lightest prism from Vortex, the Spitfire Gen II 5x... "The new Vortex Spitfire Gen II prism optics are lighter and smaller for the magnification than any other prism sight on the market. In this episode of TFBTV, Hop tests the Spitfire Gen II 5x prism sight, with a piggyback mounted Vortex Venom red dot; a package that has 5x magnification and two sighting systems despite weighing less than an Aimpoint PRO."