Proof Research 128671 AR-Style Barrel 6mm ARC 18″ Black Carbon Fiber Finish 416R Stainless Steel Material Rifle Length with Threading & .750″ Gas Journal Diameter for AR-Platform

Caliber or Gauge: N/A Length: 18″ Model: AR-Style Barrel Twist: 1:7.50″ Sights: None Bore Type: N/A Finish: Carbon Fiber Type: N/A Chokes Included: N/A Barrel Type: Rifle Length Ammo Type: N/A Barrel Features: Carbon Fiber Wrapped