Level I Retention A popular mid-ride duty holster with the added security of ALS, the Safariland Model 6390 Holster provides Level I Retention without inhibiting the draw stroke. The ALS Automatic Locking System engages automatically upon holstering, but releases quickly and easily with a swipe of the thumb during the draw. The Model 6390 features durable Safari Laminate construction, with a Safari Suede lining to protect your firearm's finish. The mid-ride design carries comfortably and includes a removable Hood Guard to protect the thumb release. A variety of textures and finishes make it easy to match the Model 6390 Holster to your duty belt, and adding the optional ALS Guard allows the user to upgrade the holster to Level II Retention.