I need some help guys. The 1911 is one that I'm not all that familiar with. I have a Rock Island 1911 CS (compact) Out of 50 rounds I had (2) fail to lock open the slide with an empty mag. (3) Slide locking open with the slide catch activated in the middle of a mag. I'm confident that I didn't cause it. (1) Fail to Eject. The pistol is a thumper but I have a good grip and wasn't limp wristing. I used Armscor 230 gr. ammo and factory mag. I'm thinking I have a faulty magazine along with something else. I traded for this pistol and suspect the guy had problems out of the box. From looking at it I'm guessing he didn't shoot it much at all. What so you?