Is the original top hat perhaps stuck in the compression tube? It may not drop out easily as gunk tends to build up there.
Well I figured it would shrink some but 2 full coils worth, so whats the reason it wont cock it has to be a spacing issue right? The kit looks identical other then length of spring. Going to shoot it as is and will mess with it in the future, sure I can make it work one way or the other.