yes its stainless see ****The Ruger SR9 is chambered in 9mm Luger includes a two tone finish with adjustable sights. Additionally the handgun incorporates an ambidextrous manual safety, reversible backstrap, and picatinny rail. Cost effective and capable, the Ruger SR9 delivers on the reliability, fit and finish that Ruger is known for.
Specifications and Features:
Ruger SR9 Semi Auto Handgun
9mm Luger
4.14" barrel
6 grooves
1:10" twist
17 round capacity
Striker fired action
Ambidextrous manual safety
Internal trigger bar interlock
Striker block safety
Trigger safety
Magazine disconnect
6.5 lbs. trigger pull
Ambidextrous magazine release
Loaded chamber indicator
Glass filled nylon grips
*********Stainless steel slide
Adjustable, high visibility 3 dot sights
17 degree grip angle
22 LPI checkered grip panels
Reversible backstrap
Ruger camblock absorbs recoil
Picatinny rail
Length: 7.55"
Height: 5.52"
Width: 1.27"
Weight: 26.25 oz
Made in the USA

Richard, this slide is "Stainless Steel" according to Ruger.

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H Richard, Yes the slide is Stainless Steel --Specifications and Features:
Ruger SR9 Semi Auto Handgun --
9mm Luger --
4.14" barrel --
6 grooves --
1:10" twist --
17 round capacity --
Striker fired action --
Ambidextrous manual safety --
Internal trigger bar interlock --
Striker block safety --
Trigger safety --
Magazine disconnect --
6.5 lbs. trigger pull --
Ambidextrous magazine release --
Loaded chamber indicator --
Glass filled nylon grips --
>>>>>>>>Stainless steel slide --
Adjustable, high visibility 3 dot sights --
17 degree grip angle --
22 LPI checkered grip panels --
Reversible backstrap --
Ruger camblock absorbs recoil --
Picatinny rail --
Length: 7.55" --
Height: 5.52" --
Width: 1.27" --
Weight: 26.25 oz--