This paper model is a N99 10mm Pistol, a small gun in the Fallout 3 video game series, the papercraft was created by PepMaster. The finished model is about 30 cm long. After the phase out of the N80 in 2051, the N99 sidearm became standard issue military gear. The N99 was known for its ability to survive in the harshest of conditions and did so in many tests, as the weapon was able to reliably be restored to working condition after an extended period of time exposed to hard elements and without maintenance.
The N99 proved to stand up to its claims and as a result, is one of the most common weapons found in use in the wasteland. While many civilian weapons were ruined beyond use in the extreme conditions following the War, the N99 is commonly able to be easily restored to working order by anyone with even the most basic knowledge of firearm mechanics.
However, an N99 in poor condition can often deliver low target and armor penetration, frequent jamming, and greatly reduced accuracy. Fortunately, the weapon was produced in great numbers and many units are available for replacement parts.
The pistol uses 10mm ammunition, commonly found in Washington, D.C. and the surrounding wasteland. It is similar to the Colt 6520, which is more common on the West Coast. It is also the first actual gun available in the game, and can be found in many other places around the game world.
This weapon can be used to repair the silenced 10mm pistol and Colonel Autumn's 10mm pistol.
The 10mm pistol is almost always a superior choice to its counterpart, the Chinese pistol. It has a faster, more predictable fire rate, much greater accuracy, and better damage. It is also a generally more common find.
The 10mm pistol can fire a total of about 556 rounds, the equivalent of 47 reloads, from full condition before breaking, an amount roughly half of what the Chinese pistol can fire. [Source: wikia]
You can download the paper model template here: Fallout 3 - N99 10mm Pistol Free Paper Model Download