Self-locking holster for mechanical airsoft grenades GBR, including a safety bungee cord to prevent the grenade from falling out while running or crawling. The holster is 3D printed from a high-strength polymer with carbon fiber additives, ensuring strength and abrasion resistance. Thanks to its universal mounting, one base of the self-locking holster can be used on most Molle webbing (laser cut and standard) and belts up to 45mm wide.