Chest rig question

Hello everyone, I know i have asked this before but I didn't get this answer out of that. So anyways, I have found this nice looking chest rig

https://www.amazon.com/Condor-Modular-Chest-Set-Multicam/dp/B0037MGLVK/ref=sr_1_6?ie=UTF8&qid=1495814850&sr=8-6&keywords=molle%2Bchest%2Brig&th=1

I will be likely getting it, but what I'm wondering is more so if m4/ar15 chest rigs like these would fit 12 dart clips. The molle webbing on there is enough for me to want to use them with the fast mags i will be getting. But i need to know if the built in slots would work for any mag or other things like blasters.