Holster (10) is provided having shroud (20) with top (28), sides (34, 34'), slide bearing stop (22) with hole (24) facing slide guard. Cam slot (44) is provided through shroud (20). Protuberance slots (36, 36)' are provided in shroud (20) for receiving pistol protuberance (99). Screw (84) pivotally secures lever (70) to shroud (20). Lever (70) includes lever arm (72) having actuator (74) with bearing (76) and cam arm (78) having guide cam (80) positioned in cam slot (44) into side of shroud (20). A method for using holster is provided.