I was thinking about buying a 9.5 inch black hole weaponry 300 BLK barrel for my current SBR build. They seem solid and the price is right. Well last week they went on sale so I'm about ready to pull the trigger on one. But before I do I was wondering if anyone can speak for their accuracy and longevity? Is this barrel a good choice for a build that I plan on never selling and shooting a lot of rounds through?