The only FX platform I will own is the Boss/Royale, which means a Royale 400 in .22. It uses the original solid ST barrel, no liner/sleeve/shroud/O rings in the barrel assembly. The action is simple and robust. Can't remember the last time I cleaned the barrel, but it didn't need it! POI never shifts, and deadly accurate. If you like to tinker, don't get one. FX makes a whole bunch of rifles with enough gadgetry to keep even the most compulsive tinkerer busy. But if you want to shoot, and shoot, with no interruptions, the Royale will do it.