I don't have a ton of experience with SST Repros, I've only owned a couple, but neither of the selectors on those two guns slid like butter, it took some effort. But, what I found is that if I Push hard, it'll come easy.
So, I would recommend that you push hard . . . perhaps real hard. After it has moved, give it a drop or so of lubricating oil and move it back and forth a few times until it slides the way you'd expect it to slide. After you've done this, please report back.
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Wild Skies
Since 1951
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