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 shockproof, allowing for reliable use in a wide range of environments. The reticles are etched directly on the glass to make sure you have a consistent point-of-aim at all times. Whether you have the illumination on or off, the reticle is always visible.Midas TSP1 Model has a TSP1 reticle in it.