M4 SERIES OUTER BARREL ADJUSTMENT SHIM RING SET [FirstFactory]]

*This product is a custom part designed for use with amusement guns intended for ages 18 and older. Please do not use it for any purpose other than its original purpose. *Although every effort has been made to ensure the quality of the product, please make sure there is no damage before use. Do not use the product if it is defective. We are not responsible for damage or accidents caused by incorrect use, so please handle with care. Please keep out of reach of small children when storing. *The product may deform, discolor, or deteriorate if left in direct sunlight, in a car under the blazing sun, or in a hot and humid place for a long period of time. *If the product is subjected to strong impact, it may be deformed or damaged. The product may discolor due to usage conditions or deterioration over time. *Specifications are subject to change slightly from lot to lot without notice.