Under gassed?

[Flyby]

The gas port location on the AR15 is usually positioned to allow a handguard cap to be sandwiched between the shoulder on the barrel profile, and the Front Sight Base for a traditional AR15 configuration.

Since so many guns are being built as free-floaters with lo-pro gas blocks, and a new generation of shooters is jumping into the AR15 build process, this is easily over-looked, while being a well-known consideration for those of us who have been messing with them for decades. I hope you didn't open your port unnecessarily, because larger ports erode faster.

Makes perfect sense. Learn something new every day.