Product DescriptionThe Rock River Arms RRAGE 3G complete A4 carbine upper is a ready-to-install upper assembly built for AR-15 style platforms chambered in 5.56mm NATO (also compatible with .223 Remington). It features an extruded aluminum A4 upper receiver with port door and no forward assist, paired with a 16-inch chrome moly barrel and an A2 flash hider. A 15-inch RRAGE 3G M-LOK compatible free-float handguard provides ample space for accessories while helping maintain accuracy. This upper ships as a complete package including a bolt carrier group and charging handle assembly.Product Highlights Complete RRAGE 3G upper assembly with bolt carrier group and charging handle included 16-inch chrome moly barrel for durable, consistent performance 15-inch RRAGE 3G free-float M-LOK handguard for flexible accessory mounting Extruded aluminum A4 upper receiver with port door and no forward assist A2 flash hider with 1/2x28 muzzle threads Specs Brand: Rock River Arms Model/Series: LAR-15M / RRAGE 3G Type: Complete Upper Assembly Caliber/Chamber: 5.56mm NATO (also supports .223 Remington) Barrel Length: 16 in Barrel Material: Chrome Moly / Steel Upper Receiver Material: Aluminum (extruded A4) Handguard: 15 in RRAGE 3G, M-LOK compatible (free-float) Muzzle Device: A2 flash hider Muzzle Threads: 1/2x28 Gas System: Carbine length (low-profile gas block) Twist Rate: 1:8 Finish/Color: Black Included Components: Bolt carrier group; charging handle assembly Weight: 4.25 lb (approx.) Manufacturer Part Number: BB0470 UPC: 842834123865 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.