Skeet Shooter Achievement in Halo: The Master Chief Collection

This achievement is best done in a Custom Game with another player. Also, keep in mind that Man Cannons are primarily found on the rooftop platform of the bases in the Bloodline map. With that said, grab another player and in the Custom Game lobby, change the player traits under the Slayer gametype so that players do not have shields and all damage is 500% more effective. Additionally, change the starting weapons so that each player spawns with Beam Rifles.

Once the match starts, have one player position themselves in the center of the map while the second player communicates which base they will be utilizing. The second player will want to launch themselves off the Man Cannon while the first player snipes them out of mid-air with a single shot. Continue grinding this out until the achievement unlocks, then switch roles so that your partner can obtain the achievement as well.