The holster securely locks the handheld device, such as a radio within the holster body and allows the radio or device to be readily inserted or removed with a single hand. The holster has a resilient polymer body molded to have an integral pair of retention ears, which hinge to securely lock the device in place and a projection member, which applies an outward force on the device to urge it outward from the holster when the retention ears are manually disengaged.