ED-SKaR, Since the gun shoots about 365 with a .25g BB, my range isn't much greater than that of an AEG. That said, because the gun is so consistent (accurate), my effective range is a bit greater. I've made some pretty long shots with it.
The wood kit is from a real 870, everything else is stock fom G&P. I threaded a wood plug for the sling swivel, and pinned that plug into the existing magazine tube.
I do like the plain sights better too, but the red dot gives a great point of reference. It's downright deadly.