PacMan has a tutorial showing a straightforward process of attaching a Magpul CTR stock to a gas blowback airsoft rifle. Before attempting the actual assembly, he breaks down the mechanics of the stock to ensure the audience understands how the internal components move. The main action relies on a combination of moving pieces that require a bit of manual coordination.

To prep the stock for installation, you need to firmly pull down the main adjustment lever, which exposes an internal locking pin. From there, you must pull that small pin even further downward in the same direction, a step that requires a bit of finger strength. Holding both the lever and the pin in this retracted position clears the pathway inside the stock.

With the mechanisms fully pulled back, you simply line up the stock and slide it straight onto the rifle's buffer tube. Once it handles the initial push and slides into place, you can let go of the tension, and the stock is successfully installed.