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So I recently purchased a BCM Upper with the 13in KMR. I attached one of the supplied polymer rail sections and went to test fit a tango down qd vert grip on it. As I tightened it down I noticed that it was wobbly. I tightened down the nut and now it is snug. It was previously spec'd for a Troy Battle Rail and I thought it was interesting that they don't have the same specs.
Anybody else notice that?
Anybody else notice that?
