TacFire AR-Stoner 300 AAC Blackout AR-15 Complete Upper Receiver - 5in - Black - 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. Features Made in the USA ; Upper receiver with M4 feedramps; Low profile .750 gas block; Micro gas tube; 4in MLOK hand guard; Charging handle; Dust cover; Forward assist; A2 flash hider;