Andrew Lai from the 4UAD Smart Airsoft team reviews the SRU SRUNA 22, a bullpup airsoft rifle built on the KJ Works KC02 gas blowback system. The video features a sequence of the rifle being used in an outdoor environment followed by a technical analysis of its build materials. The construction includes a 3D-printed body, an aluminum rail system, and a carbon fiber barrel shroud.

Andrew performs a series of performance tests, measuring the rifle's muzzle velocity and accuracy at different distances. The results show that the rifle produces high power levels out of the box, which may necessitate internal adjustments to meet local field regulations. The evaluation also covers the ergonomics of the bullpup layout and the placement of the functional controls.

A significant portion of the video is dedicated to a teardown of the internal components, including the TDC hop-up unit and the nozzle assembly. The demonstration explains how the rifle utilizes proprietary parts alongside standard KC02 internals. Suggestions are provided for swapping specific components, such as the hop-up bucking, to modify the rifle's firing characteristics.