Product Description The Rock River Arms LAR-15M Coyote Carbine A4 Complete Upper is built for AR-15 owners who want a ready-to-pin-on upper in hard-hitting 300 AAC Blackout. It features a 16-inch chrome moly barrel with a 1:8 twist for versatile projectile stabilization, a low-profile gas block, and a 12.5-inch lightweight free-float M-LOK handguard for modern accessory mounting. A Smith Vortex flash hider with 5/8-24 threads helps reduce flash, and the assembly comes complete with a bolt carrier group and charging handle so you can finish your build with confidence. Product Highlights Complete AR-15 upper receiver assembly in 300 AAC Blackout, designed to pin to mil-spec compatible lowers 16-inch chrome moly barrel with 1:8 twist for balanced performance across a wide range of loads 12.5-inch free-float M-LOK lightweight handguard for stable accuracy and flexible accessory placement Smith Vortex flash hider (5/8-24) to help reduce muzzle flash signature Includes bolt carrier group and charging handle assembly for a true complete-upper setup Specs Brand: Rock River Arms Model/Type: LAR-15M Coyote Carbine A4 (Flat-Top) Complete Upper Receiver Assembly Caliber: 300 AAC Blackout (7.62x35mm) Barrel Length: 16 in Barrel Material: Chrome moly steel Rifling Twist Rate: 1:8 Muzzle Device: Smith Vortex flash hider Muzzle Thread: 5/8-24 Gas System: Low-profile gas block Handguard: 12.5 in free-float M-LOK lightweight rail Included: Bolt carrier group and charging handle assembly Country of Manufacture: United States of America UPC: 842834108756 Manufacturer Part Number: BLK0592 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.