I tried to reverse the magazine release button last night. I was able to reach a finger inside the grip and hold down the release spring with a fingernail and slide the release button out. 6 straight hours later, I have been unable to get it back in. I've tried every method possible to pin the spring down and clear the way for the button to go back in, but no matter how tightly I'm able to pin it down, I simply cannot get it back in... either way. It's been over a year since your post, but if you had any success, please reply. Thanks.