I'm not big on scopes on levers. I like receiver sights. But, I just put a Burris Fastfire on mount made by Turnbull that goes out on the barrel in a mount that fits in the sight notch. It is low and very very FAST. With a 2 MOA dot, I was making hits out to 250 yards this weekend about as fast as I could ever imagine. Plus, the Fastfire is so small that it doesn't disturb the balance of the gun at all.
This rig is going to be extra deadly on deer this year.
Barrel mount 
