Certain aspects of the present disclosure provide methods and apparatus for multi user bar protocols and frames. According to certain aspects, an apparatus is provided for wireless communications. The apparatus generally includes a processing system configured to determine that a plurality of devices have a first capability and generate a multi-user (MU) packet that solicits an immediate response from a plurality of the devices, wherein the immediate response comprises an acknowledgment (ACK) or block ACK (BA) and an interface configured to output the MU packet for transmission.