Alexandr does a video showing the features of the SA-C04 CQB-R AEG from Specna Arms that Russian airsoft players can order from Airsoft-RUS... "The body is made of nylon, the forend is made of aluminum alloy. The receiver consists of two halves: an upper and a lower receiver, which are connected by two pins. The barrel and forend are attached to the upper receiver, and the stock guide and pistol grip to the lower receiver. All connections are made tightly and securely, there are no backlashes at all. The top receiver cover has a standard picatinny rail, on which you can mount almost any collimator or optical sight.

The buttstock is plastic sliding, non-folding. In the upper part of the butt and on the gas block on both sides there are swivels for fastening the belt, and the belt can also be attached to the butt with a belt grip. The sling swivel design allows you to attach the strap for both right and left hand use. The magazine reset button is located on the right side of the lower receiver and makes it equally convenient to replace the magazine with either hand. The stock and pistol grip are made of shock-resistant ABS plastic.

Inside there is a version 2 gearbox, made of aluminum alloy. All gearbox components are standard and compatible with spare parts from most other manufacturers. This provides high maintainability and wide tuning possibilities. Hop-up chamber modified M4 type. Made of aluminum alloy. The electrical part of the mechanism is capable of working without any modifications with batteries with high current efficiency, such as lithium polymer, 7.4V."