Interfaces with SureFire H-Series WeaponLights (not the weapon) to activate light/laser on the draw. Accommodates pistols equipped with SF Ryder suppressors and red dot optics. Cover All The Bases. The revolutionary SureFire MasterFire Rapid Deploy Holster (RDH) is a lightweight, durable holster that provides a tactical advantage with its ergonomic, one-of-a-kind design. It securely holds most any railed handgun equipped with a SureFire H-Series WeaponLight, positioning it at an advantageous angle for a fast, consistent draw stroke. A proprietary lug-and-cam system locks the firearm in place with Level 3 retention, utilizing both a primary and secondary locking system, which is released by an ergonomic thumb-break for rapid weapon deployment. The holsters open design also accommodates most any red-dot optics and/or suppressor.