Great spring, install was easy and my cycloneshock shoots as hard as my rival finisher now. I will warn you that the blaster is now a lot harder to prime. I would not recommend putting a more powerful spring in then this one because the stock internals will not be able to handle it.
Tried installing in a Cycloneshock, but the pull was too heavy and nearly caused some of the mechanism to break. Stock spring seems decent enough when the Cycloneshock is rechambered for elite darts, so sticking with that.
It was fairly easy to install and now my blaster has twice the range.
Recently printed a 3 shot elite cylinder for the cyclone shock and needed more power to get proper performance. Spring worked perfectly in the build, another great product!
The Cycloneshock cannot take this spring! I installed it in mine and it snapped the plunger rod, destroying the custom mod I was working on for a friend. No way to fix besides buying an entire new blaster and starting over.