Swap Meet
Swap Meet is an achievement in Halo: Reach.[1] To unlock this achievement, a player must trade weapons with an AI ally in Campaign or Firefight.
Trivia
- This achievement is very similar to the achievement 'Trading Down' in Halo 3: ODST. It is unlocked the same way, but replacing the Rocket Launcher in the picture is the Designated Marksman Rifle.
Sources