twin spring system (TSS) use's two spring's that are
individually adjustable to prevent hammer bounce. It is the easiest
installation and adjustment system out there. The new design allows replacement of the hammer springs without gun disassembly, just unscrew the hammer adjuster out the back and the spring(s) come right out. The TSS system will give
you more shots, make your gun quieter and tighten up your extreme
spread. It is the best bang for the buck!