USGI Surplus A2 Detachable Carry Handle - (Iron sights)

Mixed forgings of used A2 carry handles.  Signs of wear and storage, but generally good condition. 

You want to return to iron sights but you only have a flattop upper.  Get a fixed carry handle because they are a vibe and supremely robust.  

You can also mount an ACOG in the sight channel. 

Be a man.  Do it.