A pistol holster system with a lock system for locking a pistol within a holster, the pistol holster system comprising: - a holster having a body, - a cord placed on the body of the holster, to grasp the pistol within the holster from behind, the cord being movable to a 90° rotated release position in which the pistol can come out from the holster, - a lever placed on the body of the holster which, when a force is applied thereto downwards, enables said cord to get loose from a locking point and to move to said 90° rotated position, by means of a compression spring placed in a spring channel of said lever, - a lock part adapted to perform the locking of the pistol within the holster, by entering between lock channels (12.1) on a picatinny rail of the pistol, - a picatinny rail release lever placed between the holster and a platform and enabling said lock part to move down and the pistol to be released, due to release from the engagement of the picatinny lock channels (12.1), when the picatinny lever is pushed agsinst a compression spring, - a cover protecting said lock part, - said body of the holster having a recessed portion which engages into the trigger cavity of the pistol when the pistol is placed into the holster, said recessed portion enabling the pistol to be removed from the holster upon applying a pull force on the pistol, - said holster system further including a chest holster buckle, and a leg and waist buckle, - each buckle having a buckle inner fastener and a buckle outer fastener screwed to the buckle inner fastener, - said holster including a buckle mounting apparatus which can be pressed to cause opening of lock wings (4. 1) which enable the buckle inner fastener to be released or to be attached to an adjustment gear (15.1) on the buckle inner fastener, a wing spring enabling said lock wings (4.1) to be opened when a force is transmitted by pressing the mounting apparatus. - a holster having a body, - a cord placed on the body of the holster, to grasp the pistol within the holster from behind, the cord being movable to a 90° rotated release position in which the pistol can come out from the holster, - a lever placed on the body of the holster which, when a force is applied thereto downwards, enables said cord to get loose from a locking point and to move to said 90° rotated position, by means of a compression spring placed in a spring channel of said lever, - a lock part adapted to perform the locking of the pistol within the holster, by entering between lock channels (12.1) on a picatinny rail of the pistol, - a picatinny rail release lever placed between the holster and a platform and enabling said lock part to move down and the pistol to be released, due to release from the engagement of the picatinny lock channels (12.1), when the picatinny lever is pushed agsinst a compression spring, - a cover protecting said lock part, - said body of the holster having a recessed portion which engages into the trigger cavity of the pistol when the pistol is placed into the holster, said recessed portion enabling the pistol to be removed from the holster upon applying a pull force on the pistol, - said holster system further including a chest holster buckle, and a leg and waist buckle, - each buckle having a buckle inner fastener and a buckle outer fastener screwed to the buckle inner fastener, - said holster including a buckle mounting apparatus which can be pressed to cause opening of lock wings (4. 1) which enable the buckle inner fastener to be released or to be attached to an adjustment gear (15.1) on the buckle inner fastener, a wing spring enabling said lock wings (4.1) to be opened when a force is transmitted by pressing the mounting apparatus.