I have this beat up old benjimin air rifle that was missing the rear sight and I also had a simmons scope in pretty bad shape. well with a little super glue, some cardboard shims and hillbilly engineering I cobbled togeather a ugly ass rat killin machine. I sighted it in at 10 yards and it grouped 3 shoots into about 3/4 in which aint bad concidering the 10 pound trigger. took it out and killed 2 sage rats at about 25 yards. the .20 caliber is a noticebly better killer than my sons .177 and its quiet enough it dont bother the nieghbors. overall I'm pretty happy with it. may even have to look at buying a decent scope and real mounts.