So I'm putting together a 300 BLK for some night hog hunting next year and I need some help with the choice of optics. I've got an extra flashlight laying around (Surefire 6P clone) that I was going to put a green lens on cause I can't afford night vision. Not sure how that's going to work, but I guess I'll find out. That being said, I don't plan on shooting more than 100 yards and I'd like to limit the spending to $300 if possible. Suggestion/Recommendations?