The TacFire .300 AAC Blackout 5 inches AR-15 Complete Upper Receiver is built for superior performance and reliability in a compact package. Engineered for versatility, this upper assembly includes a precision-machined bolt carrier group, a smooth-operating charging handle and a durable M-LOK handguard for enhanced customization. The adjustable gas block allows for fine-tuned performance, optimizing function with various loads and suppressors. Whether for tactical applications or range use, this upper receiver delivers exceptional durability and accuracy, making it an excellent addition to your AR-15 platform.