I am going to put a red dot on my AR-15 for close up coyote shots, at a 45 degree angle. Has anyone used them for hunting varmints at night? I presently use a red light but have a difficult time seeing my cross hairs in a regular scope at night (old eyes). I am retired and cannot afford a thermal scope. I used one for hunting hogs in Texas with Tactical Hog Control and what a blast! I was thinking of getting the new Vortex Spitfire with the DRT reticle, circle rather than dot in the center. I believe it goes red and green. I am open for suggestions. I have only hunted at night a few times and not sure if I want to put all me fun shekels in a Gen 3. Appreciate any help on this.