Product Description The ROSCO MANUFACTURING Bloodline 16" M4 5.56 NATO barrel is built around USASOC specs for an Improved Upper Receiver Group, with Roscos performance-focused refinements. Its mid-length gas system promotes a smoother gas curve and more managed dwell time, helping deliver a balanced blend of speed, reliability, and shootability. Constructed from 4150 CMV steel and finished in nitride, this barrel is designed for durability and consistent performance. Product Highlights 16" Bloodline-series M4-profile barrel optimized for 5.56 NATO builds Mid-length gas system for a smoother gas curve and managed dwell time Durable 4150 Chrome Moly Vanadium (CMV) steel construction Nitride finish for enhanced wear and corrosion resistance Designed around USASOC Improved Upper Receiver Group specifications Specs Brand: ROSCO MANUFACTURING Series: Bloodline Caliber: 5.56 NATO Barrel Length: 16" Profile: M4 Gas System Length: Mid-Length Material: 4150 CMV (Chrome Moly Vanadium) steel Finish: Nitride UPC: 181969500074 Manufacturer Part Number: BL-16-GVT-556-7-M 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 products manufacturer.