Heat sensitive - Faxon Firearms 5.56 NATO Gunner Rifle Barrel

This barrel is extremely heat sensitive, as someone wrote before. I got the 11.5” barrel and put it into an Aero upper with an aero gas block and had an OSS suppressor on it. When shooting cold, I could get ~1 MOA groups. However, after 15-20 rounds, my groups started opening up dramatically. I waited until I had this barrel for a year and put ~2,000 rounds through it to leave this review. I’ve tried red dots and high end LPVO’s with it as well, and there is a noticeable change in accuracy once the barrel heats up. The other issue I had with this barrel is how hard it was to find a handguard that was long enough to cover the gas block, but short enough to not interfere with the muzzle device. I would not recommend this barrel.