FN PS90 SBR with CMMG 10.4 inch barrel and thread adapter installed

PS90® SBR

FN

$2,499.00
SKU:
FN3848950463-sbr
UPC:
845737002589
FFL:
Yes
Type:
Rifles
Series:
PS90
Caliber:
5.7 x 28mm
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FN PS90 SBR – 10.4" Barrel Short Barrel Rifle

The FN PS90 SBR delivers the legendary performance of the PS90 platform in a compact, suppressor-ready short barrel rifle. Professionally converted by Armory of Kings (operating under National Firearm Sales Inc), this SBR package features a CMMG 10.4" barrel and a CMMG 1/2x28 thread adapter, and is engraved to meet strict NFA requirements. Fully assembled and ready for Form 4 transfer, the PS90 SBR offers an unbeatable combination of precision, reliability, and tactical versatility.

What's Included:

ARMORY OF KINGS
BOCA RATON, FL

Why Choose the PS90 SBR?

The PS90 short barrel rifle configuration maximizes the strengths of the bullpup design — keeping the rifle compact, lightweight, and highly maneuverable without sacrificing firepower. The reduced barrel length enhances suppressor handling, while maintaining the unique 5.7x28mm performance that made the PS90 famous. Whether you're building a duty setup, a suppressed host, or a collectible, the PS90 SBR is a top-tier choice.

About the CMMG 10.4" Barrel and Thread Adapter:

This SBR features a 10.4-inch chrome moly barrel manufactured by CMMG, precision-engineered to maintain the PS90's operational reliability. The installed 1/2x28 thread adapter makes it easy to attach suppressors or muzzle devices designed for standard thread patterns. Proper installation preserves the necessary barrel float critical to the PS90’s delayed blowback operation.

Professional Conversion by Armory of Kings:

All SBR conversions and NFA-compliant receiver engravings are performed by Armory of Kings, the operating name of National Firearm Sales Inc (a licensed FFL/SOT). Every rifle is professionally converted to ATF standards, fully assembled, engraved, and ready for legal transfer. In addition to the OEM factory markings, the receiver is engraved with the following for ATF compliance:

ARMORY OF KINGS
BOCA RATON, FL

NFA Transfer Details:

  • This is a registered short barrel rifle (SBR) and classified as a Title II NFA firearm.
  • Requires ATF Form 4 approval and a $200 NFA tax stamp prior to final transfer.
  • Transferred to your FFL/SOT dealer via Form 3 before completing your Form 4 paperwork.
  • Receiving FFL must hold a valid SOT (Special Occupational Taxpayer) license.

Suppressor-Ready and Field-Tested:

Designed to pair with a wide range of suppressors, the PS90 SBR is built for maximum flexibility. The 1/2x28 thread pattern supports many popular models, making this the ideal host for a suppressed 5.7x28mm platform.

Additional Resources:

Own the ultimate PS90 — compact, suppressor-ready, and professionally converted to SBR standards. Start your transfer today and experience the perfect short barrel rifle platform.

Frequently Asked Questions (FAQ)

What is included in the FN PS90 SBR package?

The FN PS90 SBR package includes a brand new factory FN PS90 rifle, professionally converted to a short barrel rifle by Armory of Kings. It features an installed CMMG 10.4" barrel, a CMMG 1/2x28 thread adapter, compliant NFA receiver engraving, a factory 50-round magazine, and all original accessories.

Is a tax stamp required to own the PS90 SBR?

Yes. Because this is a registered short barrel rifle (SBR), an approved ATF Form 4 and a $200 NFA tax stamp are required before you can take possession. The PS90 SBR will be transferred to your local FFL/SOT dealer first, and then to you upon Form 4 approval.

Can I attach a suppressor to the PS90 SBR?

Yes. The CMMG 1/2x28 thread adapter included with the PS90 SBR allows you to attach standard 1/2x28 threaded suppressors. This makes the PS90 SBR an ideal platform for building a suppressed 5.7x28mm setup.

Who performs the SBR conversion and engraving?

The SBR conversion and compliant receiver engraving are performed by Armory of Kings, the operating name of National Firearm Sales Inc (a licensed FFL/SOT). All work is completed to ATF standards, and the receiver is engraved with "ARMORY OF KINGS
BOCA RATON, FL".

What are the benefits of a 10.4" barrel on the PS90?

The 10.4" barrel configuration significantly shortens the overall length of the PS90 while maintaining the rifle’s reliability and ballistic performance. Combined with a suppressor, the PS90 SBR is compact, balanced, and highly effective in close-quarters environments.

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