I’ve always found it trial and error. My ASG fed fine from ASG magazines, some Ares magazines, G&G but not any of the Nuprol offerings. However, the Nuprol ones would feed fine in my brothers G&G!
Try and see what works, buy one Lonex and see if it feeds then buy a few more? 😂
Now I’m a TM recoil owner I don’t have to worry about lowly AEG midcaps anyway…