Model 6390 ALS Mid-Ride Level I Retention Duty HolsterThe Safariland 6390 holster is a popular mid ride duty holster with the added security of ALS (Automatic Locking System), which provides Level I Retention without inhibiting the draw stroke. The ALS engages immediately upon holstering, but releases quickly and easily with a swipe of the thumb during the draw. Constructed from durable SafariLaminate, the Model 6390 holster has a suede lining to protect your firearm? s finish. The mid ride design