I never really bothered with the pmags with the windows until I started taking Carbine courses. I try to take at least 2 per year just to get use to the anxiety that is common with not being on the range very often but this is all part of my mental training. As some of you know not everyone has gotten into owning firearms just for the fun of it or for some type of hobby. Some of us have been on the receiving end of the bad elements of society and our eyes have become open.
When it comes to fighting under stress the notion of feeling recoil is null and probable several pounds of gun isn’t going to bother you, atleast for a little while. There have been times I have known my magpul pmags were running low because I was not under stress and I could feel the difference in weight when I turned the gun, but under stress it’s best to just look at your magazines and know where you are at. If you see less than 10rds or it’s 1/3 full you might want to do a tactical reload. If not, you have assurance your gun won’t run empty.