P90: FN's Bullpup PDW

Published on August 31, 2025
Duration: 1:00

The FN P90 is a unique bullpup Personal Defense Weapon (PDW) designed for armor penetration using a high-velocity 5.7x28mm round. Its innovative design features a sideways-feeding rotary magazine and ambidextrous controls with bottom ejection. Internally, it operates via simple blowback with an added weight to prevent bolt bounce, ensuring reliability.

Quick Summary

The FN P90 is a bullpup PDW designed for armor penetration using its high-velocity 5.7x28mm round. It features a unique horizontal-feeding rotary magazine, ambidextrous controls, and bottom casing ejection. Internally, it uses a simple blowback action with an anti-bolt bounce weight.

Chapters

  1. 00:00Introduction to the P90 PDW
  2. 00:19Magazine and Feeding Mechanism
  3. 00:35Controls and Ergonomics
  4. 00:49Internal Mechanics

Frequently Asked Questions

What makes the FN P90's magazine unique?

The FN P90 features a unique translucent magazine that stores 5.7x28mm cartridges horizontally. A rotary turntable mechanism inside the magazine rotates each cartridge 90 degrees just before it's fed into the chamber, aligning it correctly for firing.

What is the purpose of the P90's 5.7x28mm cartridge?

The 5.7x28mm cartridge was developed alongside the P90 specifically for Personal Defense Weapons (PDWs). Its design focuses on achieving high velocity with a small-diameter projectile to effectively penetrate body armor while maintaining controllability.

How does the FN P90 handle spent casings and controls?

The FN P90 is designed for ambidextrous operation. All controls, including the fire selector and charging handle, can be operated by either hand. Crucially, spent casings are ejected downwards, away from the shooter, enhancing usability for both right and left-handed individuals.

What type of action does the FN P90 use?

The FN P90 operates using a simple blowback action. To ensure reliability and prevent bolt bounce during rapid fire, it incorporates an additional internal weight specifically designed to counteract this phenomenon.

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