Call of Duty

MW3 - Sample Platter
Use 5 different Armaments in Open Combat Missions

mission Precious cargo
This is the first time you can unlock the sample platter achievement, however the tracking counts overall so this can be done over multiple missions / replays. You simply need to find & use 5 different Armaments during the open combat missions. I recommend following my video to see the exact locations of the armaments as trying to explain in text is too complex. thanks for watching.

This achievement is rather simple and straightforward forward but highlighting the first 5 armaments you will use in the Modern Warfare III campaign goes as follows

1. In the mission "Precious Cargo", you will find the sentry turret in the boat when you find your first loadout box

2. In the mission "Reactor" you will find the next 4 armaments with the first one being the helicopter right when you drop in. You will find a mortar strike right next to the self revive on the ground on the second floor of the construction building

3. Proceed to the second helicopter by the "A" building. Outside on the ground will be an additional supply drop of ammo, equipment and the precision airstrike you need to use to count toward the achievement

4. Make your way to the last helicopter and grapple to the roof next to the helicopter and find the Stealth Bomber and use it to take out the 3rd and final helicopter

5. On the same roof, behind the Stealth Bomber spawn, you will find a Bomb Drone. Pick it up and use it and the achievement will pop!

There is also a UAV on Reactor that you can find between the first helicopter and the reactor building

During the mission 'Precious cargo' you can find a Uav in one of the rooms where you acquire the mainfest in the harbour masters building, and a sentry turret in a room on the main boat near the GPS tracker.

Much easier is during the mission 'Reactor' you can find at least a Vtol, Sam turret, Mortar strike, precision airstrike and bomb drone all near supply drops with orange parachutes.
The airstrke is easiest to find just north of the bottom helicopter near the main building. The mortar is just north of the western helicopter and the bomb drone is on the north side in the middle of the map by some transformers. The vtol can be found in the empty circular structure west of the main building and you will have a few opportunities to find a SAM turret as they are much more common. For example, the small locked room in a building west of the northern helicopter.

A stealth bomber and additonal bomb drone can be found on the roof of the building south of the top most helicopter. Simply use each once (i'd recommend stacking with the 'Helo Hat trick' achievement).

*turjahino added that this does not need to be completed in one single mission