The ALS Shoulder Holster System provides heightened retention capabilities. With ALS, once the weapon is holstered it locks into place, securing it in all directions. Completely operable with the thumb, once the ALS device is instinctively released, a simple, straight out draw can be accomplished. Unique to this design is the ability to wear the holster in either a horizontal or vertical position. The harness is lightweight and cool and suspender clips keep the unit firmly in place. Fits Glock 17 Gen3, Glock 17 Gen4, Glock 17 Gen5, Glock 17C Gen3, Glock 19 Gen3, Glock 19 Gen4, Glock 19 Gen5, Glock 19C Gen3, Glock 19X, Glock 22 Gen3, Glock 22 Gen4 Glock 22C Gen3, Glock 23 Gen3, Glock 23 Gen4, Glock 23C Gen3, Glock 25, Glock 31 Gen3, Glock 32 Gen3, Glock 33 Gen3, Glock 44, Glock 45