This began about 20 years ago when I started stockpiling AR-15 magazines for some kind of SHTF / TEOTWAWKI situation. My buddies and I would make trips to the local gun shows, and pick up magazines here and there. I never intended to stockpile hundreds of magazines like some hardcore survivalist do. All I wanted was a couple of dozen magazines for every AR-15. I think 2 dozen mags for every rifle is reasonable.
Fast forward 20 years. Improvements have been made to the AR15 rifle and magazines. Due to those improvements, my current setup is outdated. Its like anything else. Technology improves, and to get the best out of your gear you need to keep up with the times. A buddy of mine who served two tours (1 tour in Iraq, 1 tour in Afghanistan) told me about Magpul Pmags. When a combat vet tells you he loves something, its in your best interest to pay attention.
Due to my buddies recommendation I ordered 2 Magpul Pmags with the windows on the side.
As soon as I handed and shot the Magpul Pmag I fell in love. The Pmags are light, window to see how many rounds are in the magazine, and anti-tilt follower.
Ok, so what do I do? I have dozens of AR15 magazines that have been collected over the years. But the anti-tilt follower technology improves the reliability of the weapon.
Since I do not want to replace my AR magazine inventory, I bought several packages of the Magpul enhanced self-leveling followers, and started replacing the followers in all of my older AR magazines.
If something is not broke, don’t fix it. My AR mags were not broke, but they did need to be upgraded.