VFC M4 mag compatibility
 

So i got a VFC M4A1 AEG and i just found out that some mags fit some don't. The question is which mag brands work with VFC i was looking to use Pmags or Emags from magpul but i don't want to buy a bunch and find out they wont work with my VFC.

I use pmags in my VFC Scar with a slight modification to the magwell.
http://shop.ehobbyasia.com/magazines...ark-earth.html

Most mags are slightly shorter front to back then vfc mags. All you need to do is fill the groove at the back of the magwell for these mags to work. I used self adhesive velcro (6$ box), the male part, to fill the groove. You can always remove the velcro if needed or replace it in a few minutes:)

Don't buy the G&P sand midcaps, my friend and myself are experiencing very bad feeding from them.

As 5kull said, the velcro makes miracles in the situation of smaller mags. while making sure the mag is pushed forward for maximum feeding and airseal, it allows you to insert or remove mags without them rubbing.