I'm glad to see that you've been turned onto airsoft. I've heard that JJ Racaza uses airsoft guns to practice much in the same way you do. Of course as someone said a lot of the gear for real firearms will work for airsoft guns, I've used my SERPA for my WE 1911 and it fit a Springfield Armory Range Officer 1911 just fine. If you look at a lot of the gear loadouts, you'll see a lot of guys using legit gear because the sizing is almost exactly the same, I use Fast Mags, Magpuls, and surefire gear to hold a lot of my airsoft stuff.