jǐngchá cóng xiányírén shēnshang sōuchū le yī bǎ zuǒlúnshǒuqiāng.
The police found a revolver on the suspect.
Tips
memory
左轮 means 'left-rotating wheel' — referring to the cylinder that rotates leftward when firing. 手枪 means 'handgun'. So it's literally a 'left-wheel handgun'.