The Rosco Bloodline Sauce Pack Barrel and BCG Kit bundles a 10.5-inch 5.56 NATO Bloodline barrel with the bolt carrier group, gas tube and gas block it needs to run (Rosco part no. SP-BL-105-556-BCG-GTC-NGB-001). Rosco Manufacturing created its Sauce Pack bundles for builders who want hand-picked parts that work together right out of the box. The Bloodline barrel is made from 4150 CMV steel with an M4 profile, a 1:7 twist and a nitride finish, and Rosco designed it for SBR and pistol builds. It weighs 19.28 ounces, so the finished short upper stays light.

Key Specifications

• The kit includes a barrel, a bolt carrier group, a gas tube and a gas block, the four parts a Rosco Sauce Pack is built around.
• Barrel length is 10.5 inches, a short length suited to compact SBR and pistol builds.
• The chambering is 5.56 NATO, which determines the ammunition the barrel must be shot with.
• The barrel is 4150 CMV steel with an M4 profile, a material and profile made for hard use.
• The twist rate is 1:7, which sets the bullet weights the rifling will stabilize.
• The muzzle is threaded 1/2×28, the standard pattern for 5.56 muzzle devices.
• The gas system is carbine length with a .750 gas block size, and the kit includes a carbine gas tube.
• The barrel and extension have a nitride finish, which resists wear and corrosion.
• The bolt carrier group is melonited, full-auto rated and properly staked, with a shot-peened bolt that has an upgraded extractor.
• The gas block is Rosco’s non-adjustable v2, which has a knockout hole at the front to help remove the gas tube.

Frequently Asked Questions

What comes in the Sauce Pack? A Rosco Sauce Pack includes a barrel, a bolt carrier group, a gas block and a gas tube. This kit pairs the 10.5-inch 5.56 NATO Bloodline barrel with a 5.56/.300 BLK bolt carrier group, a carbine gas tube and a non-adjustable gas block.

What gas system does the 10.5-inch barrel use? The Bloodline 10.5-inch barrel has a carbine-length gas system and a .750 gas block size, which is why the kit includes a carbine gas tube.

What is the barrel made from? Rosco makes the barrel from 4150 CMV steel with a nitride finish on the barrel and extension, an M4 profile, an 11-degree crown and a 1:7 twist.

Buy the Rosco Bloodline Sauce Pack Barrel and BCG Kit, 10.5-Inch 5.56 NATO

Matching the barrel, gas system and bolt carrier group is where short upper builds usually go wrong, and this kit settles it in one box. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more AR barrels while you are here.