||This mag works well with my Daniel Defense M4. No feeding problems or issues fitting in the mag well itself. The only bad thing i noticed was how small the reservior (where the bbs' go when you wind the mag). The first time you wind it, the reservior loads about 20~25 bbs' in it. But, as you continue to fire the gun it only loads around 10~15 fully wound. As always with these cheaply made products, this could just be a defect on my magazine.
-grey-ish color (pro or con?)
-works with almost all brands
-small reservior (might just be my mag)
-a bit long .. for CQB players
Pros _ Cons ... i would highly recommend this product..
Rating: [4 of 5 Stars!]