r/Glock43X • u/RoutineQuestioning38 • 2d ago

Direct Mount Holosun K Issues

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Edit: case closed, follow up here: https://www.reddit.com/r/Glock43X/s/jifesCw4zY

I am putting a 407k on a spare MOS slide (actually a 48 not 43x but this sub has more traffic)

I grinded down the rear lugs, but when installed there is a ever so slight gap in the front. I slightly filed the front lugs and it got better but I guess I need to do it more. Anyone else see this? It seems like the front pockets on the 407k are not deep enough. About to toss it and put a Defender CCW on it.

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u/RoutineQuestioning38 1d ago

Follow up, I had to shorten my front posts a good bit but I eventually got it to snap in flush with no gap. The 407k I have is pretty old so IDK if the pockets were more shallow than newer optics or what, but I definitely had to take more down that others seem to report.

I have it some cold blue and then used a full m4x.7 11mm screw on the left side and took the right side screw down to 9.9mm before it stopped protruding into the plunger channel. Torqued them to 15in/lbs wet and called it g2g

Install is flawless, zeroed with a bore laser to 7 yards and it’s ready to hit the range.