does the front sight get in the view on a flat top
"...get in the view.."
On a flat top, Depending on the Barrel installed; you could have:
NO forward sight
Traditional Front Sight
Any number of front sight combinations (aftermarket)
The flat top is just a mounting surface (Picatinny) for accessories, namely Optics.
you can mount a great variety of stuff on it...
Carry handle (w/sight)
Scopes (day & night)
sleeves to raise the mounting surface up and protect the receiver.
Whether or not the front sight gets in the way or not depends on what you put on it.
Most iron sights work well together with Optical Sights.
might be best if you help us know what you would like to do with your 'flattop'