One shot mode was recently added to the bonus playlist and I was surprised why similar mode was not released early and why this mode was not even found in COD Ghosts.
I have played similar sniper mode in Killzone 2 and I thought it is truly a skill that needs lot of practice.
We see how the Boss did it with a scopeless MORS. This is also known as the Iron class in the One Shot mode.
Mode: One shot TDM
Map: Bio Lab