Recently purchased a RIA 1911 9mm only to find that acquiring the Exact OEM magazine that came with the firearm is next to impossible. I have sent returned 3 mags from different sources already. The most recent mag from Advanced Tactical is different.... plastic follower vs OEM metal and the spring is stiffer. Loaded with ten rounds it will not even fully engage or lock into the Mag well. Advanced Tac. Says this is the updated replacement mag. REALLY! IT WON'T EVEN INSERT INTO THE GUN! Ready to abandon for a Springfield. Any insight into this problem will be appreciated.