I do not visit that site, but can offer a link to a video of an instructor I have taken classes from using one on a 9mm Sig P228.
https://www.youtube.com/watch?v=kppzw4-ApFM
I have read in one place that part of the NRA’s agenda for the future includes the possibility of removing suppressors from regulation under the National Firearms Act.
I have always thought the level of regulation here on suppressors to be silly. Even in extreme, gun-controlled Europe, one can walk into a shop in most countries and buy a suppressor with no hoops to jump through. They are treated the same as any other unregulated firearm part.
Here in the “free” United States, possession gets you 10 years unless you let the ATF crawl up your rear, wait 6 months, and pay $200 for a tax stamp.
In Europe IIRC, they are mandatory on hunting rifles.