PS90 just became worth it!!!

Published on March 9, 2026
Duration: 3:48

This guide details the modification process for the FN PS90, focusing on the installation of the X-PRT90 progressive trigger system and the necessary beveling of a CMMG barrel. It emphasizes safety checks and functional testing after modifications. Instruction is provided by SHORTSHOT TONY, an experienced firearm enthusiast.

Quick Summary

The X-PRT90 trigger system for the FN PS90 offers safe semi-automatic fire and a progressive trigger mode for increased rate of fire. Modifying a CMMG barrel by beveling the chamber is recommended to prevent brass hang-ups and ensure reliability. The PS90's 5.7x28mm caliber provides low recoil, making its high fire rate controllable.

Chapters

  1. 00:00FN PS90 & X-PRT90 Intro
  2. 00:06PS90 Overview
  3. 00:14Magazine & Caliber
  4. 00:20Design & Barrel
  5. 00:31Suppressor Details
  6. 00:36Controls & Loading
  7. 00:44Disassembly & Sights
  8. 00:50X-PRT90 Trigger Intro
  9. 00:57Sponsor Acknowledgements
  10. 01:21X-PRT90 Operation
  11. 01:31Progressive Trigger System
  12. 01:57X-PRT90 Development
  13. 02:10Ejection Port & Casings
  14. 02:26Low Recoil & Control
  15. 02:35CMMG Barrel Mod Tip
  16. 02:55Product Praise
  17. 03:10Magazine Capacity & Suppressor Use

Frequently Asked Questions

What is the X-PRT90 trigger system for the FN PS90?

The X-PRT90 is a three-position trigger system for the PS90, developed by Armory of Kings and FN Specialties. It offers safe semi-automatic fire and a unique progressive trigger mode that increases the rate of fire by applying more pressure.

Why is it recommended to bevel the chamber of a CMMG barrel for the PS90?

Beveling the chamber of a CMMG barrel is advised to prevent sharp edges from snagging brass casings. This modification ensures smoother ejection and prevents potential feeding issues like double feeds, enhancing firearm reliability.

What caliber is the FN PS90 and what are its recoil characteristics?

The FN PS90 is chambered in 5.7x28mm. It is known for having very low recoil, which makes its high rate of fire exceptionally controllable and comfortable for the shooter.

What are the key design features of the FN PS90 mentioned in the video?

Key features include its bullpup design for compactness, a distinctive top-loading magazine, a bottom ejection port, and ambidextrous charging handles. The video also highlights an SBR configuration with a 10.4-inch barrel.

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