Well I took it apart and looked,my last rifle was a DPMS,my mags wiggled around in the magwell and the mag release was soft and easy to push in,this spring is definitely stronger than my old one,could I cut a few coils out of it to loosen the tension so it's not so stiff feeling inserting a mag?mags go in easy without the spring in,other than this I'm impressed with the fit and finish of my BCM parts,thanks!