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Yes this will fit without issue --Specifications and Features: Springfield Armory XDS5902FDE -- X-Tension Grip Sleeve -- Magazine Grip Extension -- Polymer -- Flat Dark Earth --Fits: Springfield XDs 9mm Luger Magazine Backstrap Size 2

Hi Mike, Yes this will fit without issue --Specifications and Features:
Springfield Armory XDS5902FDE --
X-Tension Grip Sleeve --
Magazine Grip Extension --
Polymer --
Flat Dark Earth --Fits:
Springfield XDs 9mm Luger Magazine
Backstrap Size 2

Yes.This Fits: Springfield XDs 9mm Luger Magazine with the Back strap Size 2 Mike.