The Athlon TSP1 prism  scope gives you great versatility. This device is equipped with a prism for a crisp, vivid image. The prism-based design allows for a more compact scope without sacrificing optical quality.  The Athlon prism red dots are nitrogen-filled, fog proof and shock proof, allowing for reliable use in a wide range of environments. The reticles are etched directly on the glass to make sure you have consistent point-of-aim at all times.