The KAK Industry Pro AR-15 Barrel delivers reliable performance with 5.56 NATO chambering and a 16-inch mid-length gas system for optimal cycling and accuracy.KAK Industry Pro AR-15 Barrel5.56 NATO chambering16-inch barrel lengthMid-length gas systemPhosphate finish for corrosion resistanceBlack finishAmerican-made quality constructionEngineered for AR-15 platforms this barrel provides the perfect balance of accuracy and reliability for sporting training and tactical applications.