Came in less than a month and not damaged at all.
[GK Tactical] SIG SauerAirsoft RMR Mount Base W/ Iron Sight Set[For SIG AIR M17 / M18 GBB Series]
I attached it to the M-lOK rail on my rifle and it installed without a problem.
The ending is also good.
THEY SENT ME THE WRONG PART, I CONTACTED THEM ON WHATSAPP AND THEY DIDN'T EVEN READ MY MESSAGES. DO NOT BUY
Does not really fit VFC Glocks unless you are brave enough to do a bit of filing where the stock touches the base of the gun. You can mitigate the wobbling by putting some tape around to make it a tighter fit. I can't speak for other models and how it fits but it does the job for now.