FN Herstal PS90 SBR 5.7x28 - 10.5 in Barrel, HBI Top Rail, Three-Prong Flash Hider, 50-Rd Mag
This Belgian-made FN Herstal PS90 has been professionally converted to a short-barreled rifle with a 10.5-inch barrel. It retains the compact bullpup layout with downward ejection and ambidextrous charging handles, and it adds an installed HBI USA top optic rail. The rifle includes one translucent 50-round magazine and features a three-prong flash hider. This is an NFA item and will require a tax stamp.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm shows widespread scratches and finish blemishes on the frame. A small portion of the recoil pad is chipped. There is notable carbon buildup on the muzzle device. NFA maker engraving is present inside the receiver.
What's Included
- HBI USA top optic rail (installed)
- One 50-round translucent PS90 magazine
The PS90 platform delivers a compact bullpup configuration with downward ejection through the bottom chute and ambidextrous charging handles, making it easy to run from either shoulder. This example is configured as a short-barreled rifle with a 10.5-inch barrel for a shorter overall length while maintaining the PS90's distinct ergonomics.
Up top, an HBI USA optic rail is installed to provide a solid mounting interface. A three-prong flash hider is fitted at the muzzle. The action is semi-automatic, straight blowback, and closed-bolt, consistent with the PS90's design.
The stock and frame are black polymer, with the stock/frame molded "Fabrique Nationale Herstal BELGIUM" and the receiver marked "PS90 cal 5.7x28." It includes a left-side front sling ring and rear sling attachment points. Length of pull measures 13.5 inches.
NFA maker engraving reading "SCOTT V WILSON PENSACOLA, FL" is present inside the receiver. Capacity is 50+1 with the included translucent magazine. This is an NFA-regulated short-barreled rifle and will require a tax stamp for transfer.




