It's pretty good. I was impressed with the quality for the price. I would be sure to get a 45 degree m-lok or picatinny offset to keep it tucked in as much as possible. I have an m-lok handrail with full length top picatinny rail. I tried mounting the light on the side with m-lok to picatinny, and it works great, I just feel it could be tucked in a bit more, so I just bought an m-lok to picatinny 45 degree offset, so, we shall see how that goes. Radical Firearms AR-15 with Vortex Venom 1-6x 24 scope. Also, the pressure switch is extremely versatile. Good deal imo.