ICS 45 Round Mid-CAP Magazine For M4/M16 Series Airsoft AEG

"I tried to get about 5 different types of mid-caps to work in my ICS M4, and couldn't get any of them to work. I even tried many different mods, but nothing did the trick. I got these mid-caps, and they work perfectly. If you're having trouble getting mid caps to work in your ICS M4, these may be your only option. They work wonderfully and I have had 'zero' problems with them.