Safariland 6360 Level 3 Retention ALS Duty Holster, Mid-Ride, Black, STX Plain, Glock 23 with M3 Automatic Locking System (ALS) secures weapon once holstered and easily releases with thumb when initiating proper shooting grip SLS (Self Locking System) adds an additional level of retention Weapon specific thermomolded outer is suede lined to protect the weapon's finish The #6000 hood guard is standard Comes standard with a 2.25" belt slots with retention nuts