The Semi-Auto Pen creates stylistic authenticity in homage to these rifles: The pen tip: Represents the Picatinny rail of the rifle. The tip is CNC machined from solid Aluminum, consistent with true semi-auto rifle materials for a lightweight, ergonomic design. The muzzle brake or 'compensator', which redirects exploding gunpowder gases and counters recoil, is located at the tip of our pen. The pen cap end: Is inspired by the rifle's lower-receiver. This is the part of the gun that accommodates the trigger, safety, magazine housing, and carry handle/rear sights. The pen end, or buttstock which is the end of the gun that rests against the user's shoulder, has been adapted as a scope. The scope easily rotates and flips into an upward and seats magnetically when retracted. The pen clip: Represents the carry handle and peep sight of the rifle. The mechanism: The side-click arm represents the bolt-group and trigger of the rifle. The mechanism is clicked or 'fired' forward to extend the refill. It takes standard Parker refills and comes in a variety of metals and woods.