This spring is great and powerful I am 15 and if I have the slightest bit of moisture on my hand it is hard to prime. I can do it but it is hard. I would recommend a 3D printed T pull for the Kronos with this upgrade spring in the gun. Otherwise great product.
It’s a good k26 spring for a Kronos does exactly what you expect
120-125. Nope I’m getting 140 using the same Chronograph. It pops. Prime is stronger but not bad with grip tape. The fun of the shot is incredible!
I bought this spring thinking it was going to give my Kronos a good 20 FPS boost without making the prime weight overly difficult. In short, I was wrong. The Kronos will definitely hit 120 FPS with this spring but the prime weight is so heavy that I really had to struggle to even prime it once, and I'm a full grown man. Unless you're a weight lifter with biceps of steel I'd recommend sticking with the stock 100 fps Kronos spring.
Great Spring! Fires like a cannon