The Stoeger F40 Underlever takes full advantage of using an underlever rather than a break-barrel. Its accuracy is improved over previous airguns from Stoeger. There is also considerably less wear to the airgun's most important part, where the receiver meets the barrel. Furthermore, the extra weight on the cocking lever is placed ideally under the barrel, ensuring a steadier shot time after time. Try the F40 for yourself and see the difference.
The F40 uses a fixed barrel, which means that every shot is mechanically consistent with the next one. The long underlevel requires less effort to operate, and when not in use locks positively under the barrel giving the rifle balance.