EZshoot Compact Green Laser Sight Low Profile with Adjustable Slide Rail Rechargeable for Pistol Compatible with 21mm Picatinny About this item Compatible with 21MM Picatinny Rail Fits all sizes of pistols equipped with a Picatinny rail, from sub-compact and compact pistols to standard size pistols. Adjustable Sliding Rail The upgraded EZshoot laser sight boasts a removable and adjustable sliding rail design, allowing for optimal positioning adjustments via sliding rail interface plates. Additionally, just one screw is required to securely mount the laser sight onto the Picatinny rail. 0.49IN Installation Space Requires a minimum of 0.49in installation space (from slot to trigger guard). Compact and Lightweight Crafted from aluminum and plastic, this design is small, low-profile, and extremely lightweight, making it perfect for target shooting and concealed carry. It is also compatible with most holsters designed for rail-mounted lasers. Rechargeable Universal Charging The EZshoot red laser sight is equipped with a built-in battery, allowing for convenient charging without the need to remove the device. A full charge takes approximately 1.5 hours and provides up to 4 hours of maximum runtime. It features a Class IIIA high visible green laser with a power output of less than 5mW and a wavelength of 650nm. _x000D_