The Rosco Sp-Bl-125-556-Bcg-Gtc-Ngb-001 Saucepack+Urg brings together Rosco Manufacturing’s Bloodline 12.5" 5.56 NATO barrel with a matched bolt carrier group, gas block, and gas tube for a cohesive AR-15 build. The government-profile barrel uses durable chrome moly vanadium steel with a nitride/melonite treatment, and features a 1/7 twist and 1/2x28 threaded muzzle for easy attachment of compatible devices. Paired with a melonite-finished M16-pattern BCG and low-profile gas block, this kit is engineered to run smoothly as a complete upper group solution.

This Sauce Pack is ideal for builders who want proven components that work together without trial and error. The 12.5" barrel length offers a balance of maneuverability and ballistic performance for range use, training, and general-purpose carbine or pistol builds where reliability and consistency matter. With carefully selected parts from Rosco’s Bloodline series, the kit reflects the manufacturer’s focus on hard-use durability and thoughtful engineering.

Key Features:

• Manufacturer: Rosco Manufacturing
• Model: Bloodline Sauce Pack
• Caliber: 5.56 NATO / .223 Rem
• Barrel Length: 12.5"
• Threaded Barrel: 1/2x28
• Barrel Profile: Government / SOCOM
• Gas System Length: Carbine
• Included Components: Barrel, Bolt Carrier Group, Gas Block, Gas Tube
• Finish: Nitride / Melonite
• Platform: AR-15