I inherited a 20 round air service magazine which belonged to my dad. He had purchased a Remington ‘03 Springfield before I came along which had the large magazine installed; he wasn’t aware that the magazine was somewhat rare and he eventually remove it and went with a 03-A3 floor plate (which; even to my young, inexperienced eyes looked terrible). Now the magazine spring was astounding; it was wound in a rectangular pattern and when relaxed was about three feet long. Over time, dad decided the spring was taking up to much space and it was discarded. I’d like to know if there might be a spring available that would allow using the magazine once again. I’ve seen the extended magazine’s for the ‘98 Mauser and was wondering if anyone had taken the follower out to inspect the spring. Thanks, guys