I'm dropping my folding BUIS for a fixed one on my new build. I'm asking $85 shipped for it (looks like they are $125 new). This BUIS has the spring-loaded locking detent that locks it upright until you depress it to fold it back down. It's in like-new condition, not a scratch or mark anywhere on it (for me, "like-new" means I wouldn't be able to tell the difference between this one and a brand new one if they were side by side). If you have any questions on it or interest in it, shoot me a PM. Here are some pictures.
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