Hey every one. Im looking into getting a tritium front post for my ar15. My main reason is for a night time defencive carbine. I have an aimpoint on it now, but i just want somthing simple no batteries nothing to go wrong. The 2 i was looking at was the trijcon circle front post or the xs tritium front bar by xs sight systems. Any one use them pros, cons? Thanks guys and gals.