The FN PS90 is a bullpup semi-automatic rifle chambered in 5.7x28mm with a 16-inch black steel barrel. It has a flat dark earth thumbhole synthetic stock, an aluminum alloy receiver with Picatinny rail, and ambidextrous controls. The top-loading magazine holds 50 rounds. 
 

Key Specifications 

• Brand: FN 
• Model: PS90 
• Caliber: 5.7x28mm 
• Action: Semi Auto 
• Capacity: 50 
• Barrel Length: 16 in 
• Color/Finish: Flat Dark Earth 
   

Detailed Features 

• Bullpup layout with flat dark earth thumbhole synthetic stock 
• Ambidextrous controls 
• Aluminum alloy receiver with Picatinny rail 
• Black steel barrel 
• 50-round top-loading magazine

Owners of the PS90 tend to focus on its handling. The bullpup layout puts most of the weight behind the grip, which makes it more comfortable to hold at ready for extended periods than a conventional carbine. The flat dark earth finish is popular and the thumbhole stock fits the PS90 profile well.

The 5.7x28mm chambering is the primary discussion point in any owner conversation. Ammunition availability has improved but it is still more expensive than common rifle rounds. Some owners use the PS90 primarily for range work and home defense; the low recoil and 50-round capacity are frequently mentioned together as practical advantages.

Reliability is regarded as strong, though the proprietary top-loading magazine design means aftermarket options are limited. The trigger splits opinions: the geometry and travel are different from conventional rifles, and newer owners often need time to shoot it comfortably.