FYI the rod is too long for the APC9, I found out the hard way. The case extractor won’t let the rod go through the receiver.ended up ordering a 9mm rod from https://accuracy-solutions.com/
i have 3 diff mounts to test with...then a call to sico i guess. my YHM r9 performed stellar. right at $500 OTD after stamp...the omega 9k was more...
I use a Rugged obsidian 9 with their mount. No issues on my PRO.
I’ve seen people say they get strikes about everyone but Rugged and CGS 3 lug mounts.
People have complained about strikes with the rugged mount used on a obsidian 45 but not the 9.
The issue you’ll find is 3lug allows movement, if the inner sleeve of the 3 lug isn’t tight tolerance, you’ll have more movement than you should and you’ll have strikes even if the rod shows it’s good. When you use the rod, check, shake the **** out of the gun and check again.
This is the reason I got a B&T RQD can for the APC. It ratchets down and won’t move.