Poppin' & Lockin' is a multiplayer achievement in Halo: Reach added along with the Noble map pack on Tuesday, November 30, 2010. It is obtained by destroying an enemy vehicle using the Armor Lock Armor Ability. An easy way to do this is to play Big Team Battle. Elite Slayer on Hemorrhage is very easy, since there are many Ghosts. Like always, people try to splatter you.