The JT P365 Grip Module includes an improved grip shape for better ergonomics, expertly engineered texture for an uncomprising feel, flared magazine well for better magazine changes, and an ambidextrous thumb ledge for improved control. To top it all off, the custom base plates allow you to change grip lengths from 365 to 365XL to 365 XMacro simply by changing your magazine. It's the perfect upgrade to your P365.