These adapters are designed to allow for mounting of various optics/ sights onto the ATOM slide. They allow for switching sights without having to replace or re-mill the slide. Note that you'll also need an ATOM Slide and an optic.
ATOM Adapters are made from certified 6061-T6 aluminum and CNC’d to Unity's stringent requirements. Each adapter is Type 3 Hardcoat anodized and passes a QC Process before shipping.