Do not buy! - Streamlight TLR-7 HL-X 1913 Sub USB Multi-Fuel High-Lumen Rail-Mounted Light

In order to attach this light to your weapon and stop it from flying off, you will need to use what Streamlight calls an eClip. It attaches to the end of the screw that attaches the light to your weapon. It is almost impossible to put on. Your light will fly off your gun without it. Streamlight refuses to make a video on how to easily attach the eClip because it is almost impossible to do it. Do not buy!