FN PS90 SBR (FDE) – 10.4" Short Barrel Rifle

The FN PS90 SBR (Flat Dark Earth) delivers the iconic PS90 performance in a compact, suppressor-ready package. Converted by Armory of Kings (National Firearm Sales Inc), this short barrel rifle features a CMMG 10.4" chrome moly barrel with your choice of muzzle device, and is fully engraved to meet NFA requirements. Lightweight, maneuverable, and reliable, the PS90 SBR is an outstanding choice for tactical use, suppressed builds, or serious collectors.

What’s Included

Factory FN PS90 Rifle in Flat Dark Earth professionally converted to SBR

CMMG 10.4" Chrome Moly Barrel installed

CMMG 1/2x28 Thread Adapter (M12x1 LH to 1/2x28)

Factory magazine 

Factory box, manual, and accessories

NFA-Compliant Engraving:
ARMORY OF KINGS
BOCA RATON, FL

Muzzle Device Options

CMMG 1/2x28 Thread Adapter – Maximum versatility. Ideal if you plan to run standard suppressors or muzzle devices.

Why Choose the PS90 SBR?

Compact Bullpup Design – Short overall length with full-size firepower.

Suppressor-Ready – 10.4" barrel enhances suppressed handling.

Legendary 5.7x28mm Performance – Flat shooting, high velocity, and proven reliability.

Versatile Use – Perfect for duty setups, suppressed hosts, or high-end collections.

Professional Conversion

Armory of Kings (FFL/SOT) performs each SBR conversion in-house. Their process includes:

Precision barrel installation

Correct preservation of the PS90’s unique delayed blowback system

ATF-compliant receiver engraving

NFA Transfer Details

Classified as a Title II NFA Firearm (SBR)

Requires ATF Form 4 approval and $200 tax stamp

Ships to your FFL/SOT on Form 3 before completing your Form 4 transfer

Receiving FFL must have a valid SOT license

? Ready to own one of the most compact and reliable short barrel rifles available?
The FN PS90 SBR in FDE combines iconic design with modern tactical versatility—making it a top-tier choice for serious shooters.