Introducing the Long's Shadow First Defense® MK3/MK4 OC Stream Less Lethal Carrier. Our professional quality carrier features the Tulster® MRD (Manual Retention Device) for unparalleled user adjustment and confident carry. Available with optional duty belt and MOLLE Web Gear attachments, you can count on the MK3/MK4 carrier to perform the standard you expect from Long's Shadow Holster.