This Optic rail replaces the OEM rail on the Umarex Zelos. We found that the Oem rail was uncomfortably tall. So we designed this low rise rail, to improve ergonomics. As well as, this rail has a 20 MOA slant, OEM Rail has no slant. This makes setting up and zeroing your scope a lot easier. It also allows you to use the same scope rings you use on any other scope/airgun combo.
