This one is surprising to me.
I picked one of these up at a pawn shop for $ 100 out the door. It had a missing front fiber optic front sight. I called NEF the next day and they sent me a replacement sight plus owners manual at no charge.
I put the sight on when it arrived and took it to the range. With 2 pyrodex pellets and a Hornady 45 cal sabot slug it consistently shot 2 to 3 inch groups
at 100 yards.
It has taken two deer, one at 75 yds and the other at 110 yds. Both dropped in their tracks.