Product Description The Rosco Manufacturing Bloodline 7.5" 300 Blackout Barrel is purpose-built for short-barreled rifles (SBR) and pistol configurations intended to run suppressed. As the shortest barrel in Rosco&';s Bloodline lineup, it delivers the compact form factor of a Personal Defense Weapon (PDW) without sacrificing ballistic performance or reliability. Developed with direct input from SOCOM end users and some of the original creators of the .300 AAC Blackout caliber, every design detail has been carefully optimized for suppressed shooting with both subsonic and supersonic ammunition. The 1:5 twist rate ensures superior stabilization of heavy subsonic projectiles, while the pistol-length gas system and precisely tuned gas port deliver consistent, reliable cycling. Constructed from 4150 Chrome Moly Vanadium (CMV) steel in a heavy barrel profile, it offers outstanding strength and heat resistance. A nitride finish seals the exterior against corrosion and wear, ensuring long-term durability in demanding environments. Product Highlights Designed for SBR and pistol builds optimized for suppressed shooting with .300 AAC Blackout subsonic and supersonic loads 1:5 twist rate specifically tuned to stabilize heavy subsonic projectiles at this compact 7.5-inch barrel length 4150 Chrome Moly Vanadium (CMV) steel in a heavy barrel profile for outstanding durability and heat dissipation Nitride finish delivers enhanced corrosion resistance and extended service life under hard-use conditions Pistol-length gas system with .750" gas block journal and 5/8x24 threaded muzzle for full suppressor and accessory compatibility Specs Brand: Rosco Manufacturing Model: Bloodline MPN: BL-075-HB-300BLK-5-P UPC: 850039693175 Caliber: .300 AAC Blackout Barrel Length: 7.5 in Barrel Profile: Heavy Barrel Material: 4150 Chrome Moly Vanadium (CMV) Steel Finish: Nitride Twist Rate: 1:5 Gas System Length: Pistol Length Gas Block Journal Diameter: .750 in Thread Pattern: 5/8x24 Compatible Platform: AR-15 Color: Black Weight: 17.23 oz 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. ]]>