The Ranger AR-15 Barrel is precision-engineered for 5.56mm chambering with a 16-inch length and round profile design featuring an intermediate gas system.AR-15 Ranger Barrel - Model TR-556RAIG16RT85.56mm/.223 Remington chamber16-inch barrel lengthRound profile configurationIntermediate gas system for reliable cyclingCompatible with standard AR-15 platformsIdeal for building or upgrading AR-15 rifles this barrel provides reliable performance for recreational shooting hunting and tactical applications with consistent accuracy and dependable function.