What is your technique for a reliable and speedy mag release. For instance the FAST drill. shoot two / change mag / shoot 4

The manual shows a strong hand index finger press. I really can't seem to do that.

The only reasonable thing I can come up with is weak hand thumb transitions from pointing forward to curling down while the hand moves down and mag is released as part of the movement to grab the next mag.

Does this sound reasonable? Any better ideas? I can't think of anything that would require less mechanics and movement, plus this keeps the weapon at eye level and always on target.

It's what I'm going to practice unless someone has a better technique I should try.