Unless you have a compelling reason to change the recoil spring assembly (RSA), such as shooting extemely light loads in competition, that would cause the gun not to run, as a Glock Armorer, I strongly suggest you not mess around with after-market RSAs.
You can do a quick test to see if the exising RSA is up to snuff:
First of all, be absolutely sure the gun is unloaded--magazine out, slide back, nothing in the chamber, nothing in the mag well. Let the slide go to battery, then dry fire it and hold the trigger back; do not release it!
Now, point the gun straight up--with the trigger still fully depressed--and draw the slide back, then slowly let it come forward. If it does not go all the way into battery by itself, then the RSA needs to be replaced with a factory Glock RSA.