I attempted to put the entire length of the spring, at the same length it arrived in, and priming was near impossible. During the priming action, the power of the spring caused it to overpower the catch teeth before I could return it into position. It wasn't until I removed an additional 4 ring lengths (I tested with moving 2) of the total 16, was the blaster able to mechanically function similar to it's stock form. I'm new to Nerf modding so I was not expecting additional testing, on my own part, in order to complete a simple spring change.