Megacorp Security Turrets are enemies in Going Commando fought in the testing facility, Dobbo. They are small, red and silver-colored, stationary Megacorp turrets with six antenna used to create a slow moving plasma line that protects hallways from intruders. The plasma line burns intruders to ash, which Megacorp Sweeper Bots clean up afterwards (although not seen on Dobbo).
Ratchet and Clank encountered them during "Explore the testing facility" in the inner facility, in which they would pop out of the floor to create plasma lines, before returning to the ground to recharge. Ratchet had to either jump over the lines, or destroy the turrets while vulnerable. In most cases, it is simpler to just dodge them. Due to their immobility and limited line of attack they are mostly a hinder to your own mobility. The Seeker Gun and Synthenoids are adept at taking them out.