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The PDF instructions sizes for M5 Bolts seems to be in error generally.
There are a few places where it lists a size ending in a 2 (ie 32) when I believe they were meant to in a 5 (ie 35); but it was done several times.
And there were a lot of 10mm M5 listed but in most cases these are not long enough to fit through the part and provide enough threads to grip (or in most cases they just were flush with the other side). When replaced with a 15mm M5 it would function. This was annoying since I ordered 10mm in quantity and end up only uses one or two and didn't order enough 15mm. There were a few others that were also short but I happened to have some of them and they were just one or two of those.
The small spacer hole size was WAY to small to fit a M4 let alone the called for M5 requiring drilling.
Now just waiting for bolt orders as metric are hard to come by locally (USA can be so annoying when it comes to metric).
BUT, that rail is ROCK SOLID! The stock unit had a little rotational play; this doesn't. Can't wait to see how it performs.