Things I liked:This is a great Sporter class rifle, you will hit the 10 ring, only if you can! This rifle will shoot an inch group at 50 yards in wind, and a 5shot group will look like you only took one shot. And this rifle only needs 2000 psi so it can be easily pumped with a hand pump, or it will extend the life of your tank because it does not use as much air. And this is a very quiet air rifle, not like the AAs200 which was killing my ear every time someone next to me shot it...challenger has a wonderful, crisp triger that is fully adjustable down to a half a pound. Things I would have changed:A better rear sight. What others should know:I went to competition with this rifle, in my first year of shooting. I shot a 479 and got 9th in the state. now I am shooting 490-511.