Research on the quality of airsoft barrels
We observed several types of barrels under microscope to study their inner finish
Chromed stainless steel barrels
Stock brass barrels
Stock JG Bar-10 g-spec barrel before polish
Stock JG Bar-10 g-spec barrel after polish
Hard anodized aluminum barrel
In general steel barrels have better inner finish and stock barrels can benefit a lot from refinishing/polishing.