What does the quick scope mod do?

Answer 1

A quick scope mod allows you to pull the left trigger only while quick scoping. You set a delay time according to which COD your playing. So basically You pull left trigger and it aims but also does the shooting for you based on the time increment you set it to shoot at.

Answer 2

Basically, instead of pulling both left and right triggers to quickscope, it allows you to pull just the left. You can improve the mod personally by adjusting the time between the pulling of the left trigger, and the mod firing the gun. The only setback is you have to change the timing for each COD (assuming thats what you're quickscoping on) I suggest writing the times down once you perfect it. It's a hassel and takes a while, but sometimes worth it.