I sent two Stock 2 barrels to Patriot Defense to have the chamber reamed. I read many happy customers here so they are GTG. I got them back today and glanced at the chamber and noticed something doesn't look right. So I grabbed a bore scope and took a closer look. holy batman!! the lands have these ledges at the end that looks like bullet shredders. these are not just burs. both barrels have the same issue. for those who had their barrel done by PT, you might want to take a closer look. they sent me a return shipping label promptly. still, this should of been caught in the QA process.