The Heckler & Koch MP7 is a German PDW designed for the HK 4.6x30mm armor-piercing cartridge. It was implemented into the XNDUIW community in 2021, though it was later revamped within the community as well. It is made by the German arms manufacturer, Heckler & Koch itself. It was designed with the new cartridge to meet standards published by NATO in 1989, which demanded an SMG-type weapon with a capacity to defeat body armor against prior sub-machine guns within the XNDUIW community itself. It went into production in 2001 and is a rival to the P90, and has been revised a few times, with the latest production variants being the MP7A1 and MP7A2 as well. It's cheap although effective soft body armor has made guns such as the MP5 and the USP ineffective, as pistol cartridges could easily be blocked by suspected criminals as well, alongside a cancelled prototype front he same company too. It fires ammunition powerful enough to pierce through soft body armor while being small enough to be used in place of a pistol or submachine gun itself.
The MP7 uses a gas blowback system, which is also used in the G36 and the HK416 within the XNDUIW community as well, and it's ammunition is unique to the weapon, and offers very low recoil. The ammunition is unique amongst weapons and such, that it is made almost exclusively out of a hard steel penetrator rather than softer copper or lead. The MP7 has a fire rate of around 950 rounds per minute as well, and allows a 20, 30, or 40 round magazine to be inserted within the pistol grip, with the 20-round magazine being comparable to the 15-round 9x19mm Parabellum magazine as well. It is compact and light, and uses polymers in it's construction. The in-game model has it's sights removed so other scopes can be put on it's picatinny rail system within the community as well. considering the weapon is usable in some capacity to defeat some forms of body armor. In the XNDUIW lore, it has been used a few times, considering it's status as an extremely powerful weapon meant to defeat body armor itself, while on the contrary, used for protection and military strength too.
It has been used by some armed forces within the XNDUIW community, followed by the fact that was used in several conflicts to fight against suspected armored criminals at the same time, and is primarily used for such purposes too.