Bright and strong - Streamlight ProTac Rail Mount 2 Long Gun Light

The short of it is that it's a flashlight with a tail that works well and mounts however you want it to. All upside. Want more? OP says I need to write more, so here it is. It's not so bright that you'll blind yourself off the walls with the business end pointed away from you. But if you're looking down the barrel of it, your eyes are going to have a bad day. 625 lumens is far more than enough to keep your profile obscured while blinding the bad guy. Don't chase the highest lumen number, as it won't actually benefit you if you're looking for a quick activating light for the house that blinds the bad guys and not you. If you want something with more throw for outdoor or duty use, then by all means get something with a bit more horsepower. For the civilian home-gamer though, this will light up what you need to see just fine. The mounts are strong, but I recommend adding your own blue locktite or rocksett to the screws if you're gonna mount it with the MLok hardware. Have t tried mounting with picatinny as I had no need for it, but I'd assume it's the same deal. End of the day Streamlight is a good brand and I've had a ton of their stuff over the years. It'd serve you well if you're in the market for a weapon torch.