Beretta's px4 storm features an exclusive beretta-designed locked breech with a rotating barrel system that reduces felt recoil and muzzle rise.The chrome-lined barrel provides extreme corrosion resistance and ease of cleaning, and it also features a deeply-recessed combat muzzle crown to protect the rifling.It also features an integral picatinny mil-std rail, a reversible magazine release, and includes 3 backstraps.This model has an ambidextrous safety/decocker and is ca compliant.Frame Finish: BlackType: PistolAction: SA/DACaliber: 40 S&WBarrel Length: 4"Capacity: 10+1Safety: Ambidextrous Safety, DecockerGrips: Black Interchangeable BackstrapSight Configuration: 3-DotWeight: 27.7 ozFrame Material: PolymerBarrel Type: Chrome-LinedSlide Description: Serrated Black Bruniton SteelSight Style: ContrastBarrel Length Range: 4.00" to 4.99"Weight Range: 16.00 oz to 31.99 oz