Here is a possible concise summary:
The video is about the FN P90, a personal defense weapon that was designed to penetrate body armor with a small and high-velocity cartridge. The video shows the features, history, and mechanics of the gun, as well as its unusual magazine system that rotates the cartridges 90 degrees before feeding them into the chamber. The video also compares the P90 with its main competitor, the HK MP7, and mentions some of the users and roles of the P90. The video ends with a teaser for a shooting session with the gun.
Here are some possible key facts extracted from the text:
1. The FN P90 is a personal defense weapon (PDW) that was developed by FN in the late 1980s to penetrate body armor.
2. The P90 uses a unique 5.7x28mm cartridge that has a straight-walled case with a polymer coating and a small, high-velocity projectile with a hardened core.
3. The P90 has a 50-round magazine that lies parallel to the top of the gun and feeds the cartridges through a rotary mechanism that turns them 90 degrees into the chamber.
4. The P90 is a simple blowback firearm with a bullpup configuration and a hammer-fired fire control group. It has a three-position selector for safe, semi-auto and full-auto modes.
5. The P90 has no iron sights but comes with various types of optics mounted on a buttress assembly above the barrel. It also has some picatinny rail for accessories.
6. The P90 was tested by NATO in 2002 against the HK MP7, another PDW that uses a 4.6x30mm cartridge. The P90 had better terminal effectiveness but worse armor penetration than the MP7, but no official adoption was made by NATO.
7. The P90 has been widely adopted by police forces and some special operations teams, but not by regular military units. It was designed to arm rear echelon troops against potential Russian paratroopers wearing body armor.