My wife (Bless Her Heart) bought me a new Mach 2 today...First NEF I have owned so far. Was threatening to get a 223 but ended up getting a new barrel for my Encore instead.
Anyway, I didn't have a scope to put on the Sportster, so I took the BSA Red Dot off my 870 shotgun and put it on the Mach 2......Not bad...not bad at all.
I was only shooting at about 40 yards to get it close....leaning out the passenger window and fighting off B57 sized Misquitos at the same time but I did get it centered.
Ought to prove real interesting when I have a chance to fine tune it or put a regular scope on.