Ordered for my glock but upon opening it found out the cut on the slide is a different footprint.

The CT RAD™ (Rapid Aiming Dot) Electronic Sight is a full-size Open Reflex Sight for full frame pistols. Featuring a red 3 MOA aiming dot, the CT RAD™ has a recessed and fully multi-coated lens with a large quick acquisition window. The CT RAD™ comes with an AUTO Shutoff Function that automatically shuts off after 8 consecutive hours of operation to conserve battery life and a manual ON/OFF Function that allows you to turn on or off the sight by using the side brightness buttons. The CT RAD™ is easily installed on an optics cut slide using the CT RAD™ footprint that is also compatible with the Docter® footprint. Textured sides allow for a secure grip when racking the slide.

The CT RAD™ has large brightness setting buttons for easy use even with gloves on. Made of 7075 Series Aerospace Aluminum, it is 30% stronger than most industry standard sights made with 6061 Series Aluminum. The entire CT RAD™ family has an Innovative top strap design that deflects force if the sight is dropped. Our engineers developed a better way to reduce stress on the lens of reflex sights. By combining out-of-the-box thinking with next-level physics, we designed a system that both re-enforces your optic and reduces stress if it happens to get dropped. All this comes with our CRIMSON Protect Lifetime Warranty.