Hello guys i recently purchased a upper its a flat top it came with a moe forearm and low profile gas block with no pic rail. I put my optic on there but i really want a set of BUIS. First problem is since i dont have a dedicated front sight and ive read that the moe hand guard shifts to much to use them. I was thinking about mounting some offset sights just on the uppper reciever. That gets me to the second problem the set of offset sights i have on my other rifle, will hang over the ejection port of i mount it to the upper. so Short of putting a a2 front sight or another gas block on it i am out of ideas. I was wanting to checked with you fellas and see if anyone has ran into this or if anyone has any suggestion or can point me to a product that can help me out.