Rosco K9 Sauce Pack Bolt Carrier Group Build Kit, 5.56/.223, 1/2×28

The Rosco K9 Sauce Pack (brand part number SP-K9-115-556-BCG-GTS) bundles an 11.5-inch 5.56/.223 barrel with a matched bolt carrier group, gas tube, and gas block for AR-platform pistol and carbine projects, created after customers repeatedly asked Rosco to package the key parts needed for a build at one combined price. Rosco hand-picks every part in the kit so the pieces synchronize together as a system rather than a random assortment of parts sourced from different vendors, and everything ships with a 1/2-28 threaded muzzle interface ready for a compensator or thread protector. It’s a straightforward way to source matched, build-ready components for a pistol-length AR project without piecing the parts list together one item at a time.

Key Specifications

• Includes an 11.5-inch barrel chambered in 5.56/.223.
• Bundles a matched bolt carrier group, gas tube, and gas block.
• Threaded at 1/2-28 for a compensator or thread protector.
• Parts are hand-picked to synchronize as a matched system.
• Built for carbine/pistol-length AR builds.
• A genuine Rosco Manufacturing Sauce Pack bundle.

Frequently Asked Questions

What’s included in this Sauce Pack? An 11.5-inch 5.56/.223 barrel, a matched bolt carrier group, a gas tube, and a gas block.

What thread pattern does this kit use? 1/2-28.

Buy the Rosco K9 Sauce Pack

Source matched, build-ready components for your next 5.56/.223 project in one bundle. Order it from our Rosco Manufacturing lineup of AR-15 bolts for fast, reliable shipping from our Lubbock, Texas gun shop.