The entry level light that you need - Streamlight ProTac Rail Mount 2 Long Gun Light

While it's hard to say something new about this light that's not already been covered in these reviews or countless other publications, I can attest that for a first-time weapon light, this little thing has illuminated to me how much of a game changer a decent flashlight is. Small and lightweight, with a staggering amount of light thrown in a dark room, it is exactly what I wanted. And with the included hardware, it was very simple to set it up exactly how I wanted. Intuitive and straightforward, I couldn't be happier. If you're on the fence about putting a light on your gun, this is the time to hit 'buy now', you won't be disappointed.