Years have passed since Arsenal Gear was destroyed, the world was no longer under the control of the Patriots. But a new mechanical monstrosity was lurking in the shadows.
See, an unknown power hidden away from the world took the concept of the Peace Walker prototype and go full on woman in its design. Making it look almost exactly like a young woman. Full on, with long black hair and grey eyes, a set of breasts that would be like Double D breasts on a normal girl and an ass that could crush a good square mile.
Speaking of that ass, it has a feature that is quite the interesting weapon. It's capable of firing ICBMs from her ass onto targets from miles away. To the sentient weapon however, it was like taking a dump for her, and right now she really had to go.
The first test of Metal Gear FML was starting, and she was packed in with her explosive load. To her, the weight of the load was becoming uncomfortable as she was told to get into position by the leader of the shadow organization, her ass in the air and her face laying on the dirt.
Once she was in position the engine of the ICBM began profiting, making her feel a rumbling feeling in her stomach. She felt the tip of the missile peak from her taut anus, making her bite her lip in desperation and excitement.
Once they had locked the target coordinates in on the Metal Gear's computer, she was finally able to let go. To the people in the bunker and on the ground the sound of the rocket engine was deafening, but the metal gear it was like a fart, wasn't too deafening to her, but it did make her face light up red as the missile came flying out of her.
Once it had left her ass and she finally felt empty, the machine woman turned to watch the rocket soar into the sky. And within an hour the missile impacted into the capital of a world power, causing mass destruction.
The shadow organization celebrates its first victory and successful test of the new metal gear while the machine itself was also taking in the sadistic pleasure of destroying so many innocent lives...