Originally Posted by ThunderCactus
The M14 has a better hop chamber design in general, much more stable, but even more annoying to adjust since you have to remove the mag.
The G&G/CA uses an AUG style hop up so it does not require removal of the magazine. It is accessed by pulling back the bolt, and even has a label on the mechbox plate saying which way is up and down. Functional bolt catches also help.