Master Locksmith Achievement in Medal of Honor: Warfighter
Used each breaching option at least once
How to unlock Master Locksmith
Keep in mind that the achievement descriptions are reversed and you may not unlock these as you think you should. Most people will unlock "Master Locksmith" before "Room Service".
There are 7 types of breach options, and you have to get breach headshots to further unlock the next option until you get all of them. To ensure that you will get enough kills in 1 playthrough, you want to ensure that you get about 2-3+ headshots per breach, and if you are unsuccessful, you can restart the checkpoint. These also transfer between playthroughs, so there's no big stress about missing it on your first time around.