I have heard replacement batteries are sometimes too long for the cover to properly close. - ADE Advanced Optics HG03 Rifle Vertical Foregrip Grip Flashlight/Green Laser Combo Sight

Pros---1. Very easy to use with simple controls.
Pros---2. Its brighter than expected.
Pros---3. The green laser is bright enough that it doesn't get washed out by the main light even when on the brightest setting. (In person you can see the laser, in the video it disappears but that's due to the camera)

Cons---1.Short battery life on max brightness/use it on low its bright enough
Cons---2. It comes with Olight branded batteries CR123A/ if you try to use other branded CR123s the hatch doesn't want to close all the way and if forced the battery compartment switch doesn't lock back into place ( REMOVE THE WASHER- remove the washer and use any CR123 that you want/ Ive included photos)