The FN PS90 Standard is a semi-automatic bullpup rifle chambered in 5.7x28mm with a 16-inch barrel and 30-round translucent polymer magazine. At 6.28 lbs it's light for a rifle with a 16-inch barrel, and the bullpup layout keeps overall length short while maintaining that barrel length. Finish is matte black. 
 

Key Specifications 

• Caliber: 5.7x28mm 
• Action: Semi-Automatic 
• Capacity: 30 rounds 
• Barrel Length: 16 inches 
• Weight: 6.28 lbs 
• Finish: Matte Black 
   

Features 

The bullpup thumbhole stock positions the action behind the trigger, which shortens the overall package without cutting barrel length -- the main practical advantage of the design. The charging handle and safety are ambidextrous, making the PS90 genuinely left-hand friendly without modification. The MIL-STD accessory rail on top accepts standard optics. The integral muzzle brake reduces recoil from an already mild cartridge. The 30-round magazine is translucent, allowing a quick visual round count. 
 
The 5.7x28mm cartridge produces high velocity from a light, small-diameter bullet. It's known for low felt recoil and flat trajectory out to 50-100 yards, which suits the PS90's intended role as a compact, controllable platform.

The PS90 attracts buyers specifically for its bullpup configuration and the 5.7x28mm cartridge -- it occupies a niche that has few direct alternatives. The compact dimensions combined with a 16-inch barrel and 30-round capacity are the defining draws, and owners consistently cite those specs as the main reasons for their purchase.

The 5.7x28mm cartridge generates steady discussion. Low recoil and high velocity are frequently praised. Ammunition cost and availability are the counterpoint -- 5.7x28mm costs more and is less broadly stocked than 9mm or .223, which affects how much owners practice.

The bullpup ergonomics divide opinions. Some shooters find the trigger feel less crisp than a conventional design due to the longer linkage inherent to bullpup layouts. Others adapt quickly and appreciate the handling characteristics. Overall balance is described as good.

Reliability is generally rated highly, with most owners reporting clean function across a range of ammunition. Occasional magazine feeding issues come up but aren't a dominant complaint. Customization options are more limited than for mainstream AR-platform rifles, which some owners find frustrating. Pricing is acknowledged as high; most buyers consider it justified by the platform's specific capabilities.