Rosco K9 Sauce Pack Features The Rosco Manufacturing K9 Sauce Pack was created after direct requests from customers for a hand-picked set of key components to build a 5.56 NATO carbine or pistol without hunting down parts individually. At the center of the kit is an 11.5 inch barrel built from stainless steel and finished in black nitride a coating chosen for its corrosion resistance and durability under sustained firing. The barrel carries a 1 in 7 inch twist rate a common choice for stabilizing heavier 5.56 projectiles at both close and extended ranges. A 1/2x28 threaded muzzle lets the builder add a compensator flash hider or suppressor mount as soon as the build is assembled. Every part within the Sauce Pack bundles is designed to synchronize together meaning the barrel and accompanying components were selected specifically to work as a complete uninterrupted system rather than a loose assortment of parts. That matched approach is intended to produce results right out of the box saving builders the trial and error of sourcing compatible components from different sources. At roughly 25.47 ounces for the barrel assembly the kit keeps the front end of a build reasonably light for handling and maneuverability. For anyone assembling a 5.56 carbine or pistol and looking for a dependable pre-matched set of core components the K9 Sauce Pack delivers exactly that. Rosco K9 Sauce Pack Specifications Manufacturer: Rosco Model: K9 Sauce Pack Type: Parts Kit Caliber: 5.56 NATO Barrel Length: 11.50 Barrel Material: Stainless Steel Barrel Finish: Black Nitride Twist Rate: 1:7 Thread Pattern: 1/2x28 Weight: 25.47 oz Available At: GrabAGun