First post so go easy on me. I am in the process of building an M4 out of a pre-ban Colt lower and possibly a RRA flat-top upper. I am going to mount an Eo-Tech sight directly to the flat-top rail of the upper. I have decided to go with the A.R.M.S. #40L low profile flip-up rear sight. My delima is choosing a front sight. Will the standard front sight housing be visable when I look through the Eo-Tech? I understand the whole "co-witness" thing, but I would prefer a clear un-obstructed view. If I need a front flip up sight, what do you think of the Yankee Hill Front Flip Sight Tower With Bottom Rail Model #YHM-9835A
Any help would be appreciated.