Need a little advice, and thought I'd turn to the experts...I've also posted this in the "Build It Yourself" column.
I'm planning on purchasing an M4 upper (either Colt or Bushmaster) to "replace" the existing upper on my pre-ban Colt. I do have a couple of concerns vis-a-vis getting a flattop model versus the "original."
"Correctness" of the military version compared to my final product aside, which is better suited for mounting of a Trijicon Reflex II sight? Will the existing front sight post/gas block interfere with the field of view of the sight? Or is this just a mounting "thing," and the problem's solved by the height of the mount on the Picatinny rail?
Additionally, any recommendations on brand (Colt vs. Bushmaster) would be appreciated as well.
Thanks in advance