An apparatus and a method of using a plurality of dual acting cylinders to acquire articles with vacuum cups is disclosed. A robot arm comprises a manipulator movable with the robot arm with the plurality of dual acting cylinders attached to the manipulator. The robot arm is configured to passively conform to a plurality of irregular articles by extending dual acting cylinders from manipulator and moving the manipulator distally with the robot arm to conform to the plurality of irregular articles. The movement causes each dual acting cylinder to passively and proximally retract from the contact of the vacuum cup with a respective irregular article and passively conform the vacuum cups and dual acting cylinders to the plurality of irregular articles. Each vacuum cup can adhere to and can manipulate acquired articles with vacuum.