Fobus CH Series, Paddle Holster, Right Hand, Black, Fits Glock 17,19,22,23,31,32, Polymer GLCH The CH Series is an active retention holster that includes a trigger locking mechanism. Press the release button with your index finger to un-holster your firearm. When re-holstering your firearm, do not press the release button and insert the firearm firmly in the holster. Active retention is automatically engaged upon re-holstering.