They appear on Tier 1 maps at wave 22 and on Tier 2 maps at wave 25. On Tier 3 maps they appear at wave 9, shortly before the second juggernaut wave in which they will plant several Claymores. They also appear on Tier 4 maps at wave 17. They place claymores around the map. When they assault the player, they are usually reckless. Unlike other enemies, they have the ability to plant Claymores but do not appear to be able to throw grenades, and are armed with a PM-9. The Claymores can be seen by the player(s), and do relatively little damage, where one claymore will only stun the player, but should the player hit another one soon after, they will likely be downed. They grant the player $150 upon death. Enemy Claymores are sometimes placed in plain sight of the player, in spots that a claymore would be very much impractical.
Enemy Claymores use the same model as the player's Claymores, are usually set down by armories and nearby the player's location, and have a particularly large range compared to their multiplayer counterparts.
Unlike in multiplayer, in Survival Mode there is no way to distinguish between claymores planted by the player and those planted by the enemy (other than memorization).