Fobus Evolution Series Paddle Holster, Outside Waistband, Right Hand, Fits Glock 43/43X/48/43X MOS/48 MOS, Black GL43RND The Evolution Series is a passive retention holster that includes a retention adjustment screw. The tension screw is not pre-set and allows for retention pressure to be adjusted based upon personal preference. When un-holstering, do so in a deliberate and rapid upward motion. Passive retention is automatically engaged upon re-holstering.