Just like the title says. I have an MFI low profile optics mount. I mounted it on my 53 the other day but didn’t tighten the screws all the way cause...
I had that issue installing mine on an HK53. Turns out the U-shaped piece that has the pushpin holes was off-center to the body of the rail. I had to...
in post Picked up my personal HK Holy Grail today!
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