Great mags. You can adjust the amount of tension on the spring that holds the follower to adjust how many rounds can fit. I'm guessing you can adjust +/- 20 or so, but I haven't adjusted it very far. I like the 100rd. The nubs on the side to lock them together fit VERY tightly, it feels as though a crowbar would have trouble getting them apart. I took them to a sander and took the nubs off because they barely in any pouches or pockets. They feed perfectly unless you knock them against something, then they spray all the rounds out -_- The feed lip feels very stiff, but once there's a speed loader or a mag well in it.
Perfect amount of ammo
Adjustable by way of large screw on the bottom
Locking nubs work well and sturdy
Locking nubs get in the way when pocketing
Feed lip is touchy, will spray bbs out with little prompting
Rating: [5 of 5 Stars!]