For those who have bought or planning to buy the Tippmann M4 Airsoft rifle, Psycayero made a video showing the compatibility of different M4 magazines, especially the third party ones. For those who want to use other magazines apart from the Tippmann, this is a helpful video so you can check which M4 mags you have that you can use with it... "This isn't really much of an issue. The magazine catch on the Tippmann M4 is pretty beefy.