FN 509 - OATH IWB Holster The OATH (Optic-Ready, Ambidextrous, Tuckable Holster) holster series is a significant addition to the Tulster product family. Engineered with a red-dot optic in mind, the OATH accommodates the most common of RDS such as the RMR and SRO while maintaining... $74.99 As low as $69.99 Choose Options Compare Selected