Rosco Manufacturing K9 Sauce Pack AR-15 5.56 NATO 13.95" 1:7 Twist 1/2x28 Mid-Length - Includes BCG & Gas Block

The Rosco Manufacturing K9 Sauce Pack is a complete AR-15 upper parts bundle designed to take the guesswork out of building a 5.56 NATO-chambered upper. At the heart of every pack sits a 13.95-inch K9 stainless steel barrel chambered in 223 Wylde for reliable 5.56 NATO and .223 Remington function, rifled with a 1:7 twist and threaded 1/2x28 for standard 5.56 muzzle devices and suppressors. The K9 barrel wears a tough black Nitride finish for long-term corrosion resistance.

This particular K9 Sauce Pack ships set up for a mid-length gas system (the GTM designation in the part number), and it comes complete with a Rosco Bloodline Bolt Carrier Group (rated for 5.56/300 BLK), a non-adjustable Bloodline Gas Block (NGB), and the matching mid-length gas tube. Every major upper component arrives matched and ready to drop onto a compatible AR-15 lower or stripped upper receiver.

Proudly made in the USA and built to Rosco's established Sauce Pack standard, the SP-K9-1395-556-BCG-GTM-NGB-001 bundle gives AR-15 builders a turnkey upper component set with consistent fit and function across the bolt carrier group, barrel, gas block, and gas tube.