In late 2006 (sometimes described as 2007 for simplicity) the Shocker SFT was redesigned into the newer "Shocker NXT" version, which is the same internal marker as the SFT, except it uses upgraded parts from the factory, and has a few enhancements to the frame, in-line regulator, and other parts of the marker to increase performance and reliability. The cosmetics were also changed to reflect the new internals. Some Shocker SFT parts are no longer compatible with the newer Shocker NXT model. This includes barrel threads, as the NXT uses the same threads as the Ion and Impulse. There are several other parts that may not be compatible, including the trigger, and vertical ASA.