The easiest possible way to do this achievement is to boost it
with someone. As of right now, I don't know of any way that you can tell if someone is zoomed in, which is why this achievement is difficult and more based off of luck then skill.
First off, if you are boosting, you and your friend both need mech's that have the zoom in capability. The Repear mech
is the closest mech you can buy. In the mech "buy room", go to the mech to the left of the starting mech and buy this mech to unlock the Repear. Then, go and buy the mech to the bottom left, which is the Repear.
Once you both have a mech with the capability, go into play, and then into server browser and select a region that doesn't have a lot of players, such as South America or Oceania. Select a map for deathmatch with no players and start up the game. Once both of you are in, have your friend press the right thumb stick to zoom in
. Now just kill him and voala, achievement unlocked.
You can also kill two birds with one stone by you zooming in as well and unlocking the Eye to Eye achievement.
The Eye to Eye achievement in HAWKEN worth 213 pointsEliminate an enemy mech that is zoomed in while you are also zoomed in.
If you downvote, please let me know why so I can fix it and if I helped out, hit that upvote. Happy hunting!