The P90 SBR is the PS90 registered as a short-barreled rifle with a 10.4-inch barrel matching the military P90 configuration. Requires an NFA Form 1 or Form 4 tax stamp. Type: Rifle Action: Semi-Automatic Caliber: 5.7x28mm Capacity: 50 Year introduced: 2005, Belgium Weight: 91.2 oz Overall length: 19.9" Status: Active Intended use: Tactical, Collecting