Upon release, the achievement was glitched, allowing players to earn it through other methods. One way of obtaining it was through kills from the grave. This could be because through respawning, you are usually sent a fair distance from the site in question.
If unlocked as intended, the achievement can only be unlocked on Wreckage, as it is the only Crimson map with man cannons. A heavy weapon can make achievement easier, but even moderate skill with a battle rifle or DMR is sufficient.