Brother wanted a good simple air rifle, which that 850 certainly is. Did do a little trigger work, but it's basicallybox-stock. Broken in, will do 810-820fps with normal weight (7.8gr.) pellets; he's pleased with it and the scope.
Did break a scope ring. Scope didn't shift or get out of wack, just "tink" while shooting...wildly off target....cause was the cheap ring snapping.