A couple years back the FBI adopted the SIG Romeo 4M carbine red dot in lieu of the Aimpoint H2.
It is pretty well known that the SIG Romeo 4/5 optics are made in the same factory as Holosun if not just rebranded Holosuns. SIG got around the Berry compliance issue by bringing in the Bureau optics as parts kits and assembling them in the US.
There were some initial issues with the mounting screws. Subsequently there have been issues with optics dying at random. My understating is they won’t be buying anymore ROMEO 4Ms when this batch is done.