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This is the newer version and has adjustable rear sights

config 2 adj sight This new model has cocking serrations on the front of the slide, and has a one-piece metal slide (under the polymer cover), whereas the previous models have a two-piece welded metal slide.[48] It is available only with adjustable sight

Donnell, Config 2 with Adjustable Rear Sights. (Front: 1-Dot ---- Rear: 2-Dot Low Profile Adjustable. Cheers and stay safe!