Geissele Barrel Asmbly 16 5.56mm

The Geissele Barrel Assembly 16 5.56mm is a complete upper receiver barrel solution designed for 5.56 NATO/.223 Wylde chamber compatibility, delivering the precision engineering Geissele Automatics is known for among AR-pattern rifle builders and professional end-users. This 16-inch barrel assembly arrives ready for integration, with gas block and tube included, eliminating the need to source and install critical gas system components separately.

The barrel features button-rifling, a manufacturing process that maintains dimensional consistency and produces tighter tolerances than traditional cut-rifling methods. The .223 Wylde chamber accepts both 5.56 NATO and .223 Remington ammunition, providing shooters flexibility in round selection for training, duty, or competitive applications. The 16-inch length balances velocity retention for 5.56 performance with handling characteristics suitable for close-quarters work, vehicle operations, and tactical environments where a full rifle-length gas system would prove cumbersome. Black finish provides corrosion resistance and consistent appearance with modern tactical platforms.

This barrel assembly serves AR builders seeking verified upper-receiver components, law enforcement and military personnel upgrading duty weapons, and shooters who demand quality control and dimensional accuracy in their ammunition platforms. The inclusion of gas block and tube simplifies the build process while ensuring the system is engineered as a matched set. Geissele's reputation for precision manufacturing makes this assembly a logical choice for those unwilling to compromise on repeatability or long-term durability in high-round-count applications.