The Trij sight you stated is my personal "multi role" sight of choice. Good for shots out to 800M, with a simple as my dumb ass retical. Good for observation out to 1000 with the X4. However, without some shooting time with the sight the X4 is not good for 50M and in. You have to train with it at short range and get comfortable with the magnification. If you shoot both eyes open 50M and in, it gets easyer to find targets. If you shoot sight eye only, especialy on the move, you will have a tough time getting targets in sight at first. Also if your going for the best speed/ accuracy at 50M, you can train to be just as fast as other shooters with dot reticals and no magnification, but you will hardly ever be as accuret. Mac NZ is totaly correct in that, A JDOT on top is a great way to go, just make sure you get one that holds it's zero. Best of luck, I have more info, if you want it.