The 515CT is a compact 20mm micro optic packed with innovations. Featuring our Multi-reticle system the 515CT allows the operator to switch from a 2 MOA dot to a 65 MOA circle dot with a push of a button. Our highly efficient light emitting diodes and Solar Fail-safe technology allow the 515CT optics to run without a battery in many lighting conditions. Additionally the CR2032 battery lasts up to 5-years. The 515CT is housed in CNC machined Titanium and comes with removable non-obstructing clear flip-up lens covers and kill flash. Holosun