Compared to metallic cartridge rifles, PCP air rifles are much more complex in design, and require more parts and more labor to assemble. In a custom bolt action rifle, there is some precision machine work involved in clambering and fitting the barrel, the bolt face needs to be square to the breech, and the lugs properly surfaced. That's about it folks, a few big pieces compared to a plethora of little, fragile pieces. When I think of all the valves, O rings, regulator, and the general weak barrel mounting systems, I'm surprised that my air rifles will shoot 100 times without some kind of glitch (and often they don't!). Most air rifle shooters can probably not imagine buying a rifle and shooting it thousands of times, over many years, with hard handling, and not having a single service issue. So, we pay more for a comparatively more problem-prone rifle, knowing that maintenance will be a constant issue. But, it's fun. I guess it's called a hobby.