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My rifle came with them pre-installed and I can’t really tell what slot they are in, but they do seem to line up with the rear of the charging handle when down. They seem to work fine I have a red dot, but I try to practice with the BUIS each session.
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A major source of objection to a free economy is precisely that it ... gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.
- Milton Friedman
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