I wish they had noise suppressors for each spring, as I dislike that whiplash sound the swift makes when you fire it. When you add this to the 1.2 spring, you're in for a smooth trigger pull and noise to match the incredible prime of the swift!
It works really well. Gets rid of the annoying sound when you prime and fire the blaster with the lowest setup.
Works great on the 1.2 spring, but THAT IS THE ONLY ONE it will work with. The other spring options are not compatible with this part.