SBR PS90? Noooooo! Do not do it until you see this video.

You guys are overspending on your PS90 SBR. We have made it easier and cheaper. Don't buy a new barrel. With our 7/16-24 to 1/2-28 Goby adapter from https://revoltmfgco.com/ , your local gunsmith can cut & thread your barrel to 7/16-24 and use the Goby. If they cant thread it, we will. Threading is $125