Assembly Instructions - 3D Bolt Action Pen

This is a 3D-printed pen designed to resemble a firearm barrel with a 4-lug bolt-action mechanism. The movement of the bolt extends the pen tip, allowing for writing, while retracting the bolt hides the pen tip. The design mimics the operation of a real bolt-action system, making it both functional and visually appealing. Perfect for firearm enthusiasts and unique desk accessories!