Are the optics from Palmetto State Armory legit?

They have some killer deals and I’m in the market for a red dot with a 3-5 MOA for a shotgun. I know there are loads of knock off optics out there so want to make sure these are good to go. Any brand to avoid? Thanks for the help.

Edit: thanks for your kindness and patience, I’m very new to all this. Like, I didn’t even know that PSA was a thing until two days ago and now it’s a huge rabbit hole for me to go down. Hoping to find a good enough but budget optic for a shotgun. Now that I’ve found PSA a lever action looks like it might be attainable this year.