I'm not knocking Sig because it was used gun. The previous owner might have altered the Sig mags? Who knows? But I still had the faulty mags. I read that a company called Tripp Research sold replacement 7-round springs and followers. I bought two kits. The springs are much stronger than what was in the old Sig Mags and doesn't let the rounds nose down. The old Sig mags work great now. I just want to give a thank you to Tripp Research.