Just got this was expecting easy fit in. I don't know which step I did wrong, but the blaster just won't prime.
The spring was a little long and the upgraded catch spring didn’t work. Might work for other blasters though.
I used this spring in my nerf fortnite basr and it did a great job upgrading it without having any trouble.
Comes with the spring, an o-ring, a catch spring, a pad, and some lubricant. Fast delivery. I didn't use this for my rampage, but the spring is of good quality.
Didn't have any problems installing it. I don't have a chrony, but it definitely hits a lot harder!