Rosco Manufacturing K9 11.5″ Barrel — Patrol Length Gas System

Rosco Manufacturing has your needs for the next build covered for you with its K9 11.5” patrol gas system barrel, among other items they offer. The K9 11.5 offers a proprietary patrol length gas system that is smoother than carbine length and is more reliable than mid-length. The end-user has the option to choose between the standard barrel or a barrel with a cookie engraving.

Rosco Mfg K9 11.5″ barrel is perfect for the next build. The K9 11.5″ has a patrol-length gas system and tube. [Photo credit: Rosco Manufacturing]

The K9 11.5” Patrol barrel is constructed of 416R Stainless Steel and features an optimized gas port to run reliably suppressed and/or unsuppressed. The K9 continuous taper is the most effective profile to dissipate heat from hard use. With weight shifted to the back of the barrel, modern attachments on the front of the rifle create a perfectly balanced and better handling rifle.

K9 11.5" barrel on white
The K9 barrel is constructed from 416R stainless steel and is theaded 1/2-28.

The K9 has the updated target crown that has been carried over from the Purebred series with improved harmonics, fit and finish. Rosco Mfg recommends a minimum handguard length of 10″ for use with this barrel. Other accessories can be purchased to go along with the barrel including gas blocks (adjustable and non), bolt carrier groups, or complete URG from Rosco.

The K9 11.5” barrel from Rosco Mfg comes with the patrol length gas tube and an MSRP starting at $165.

Cookie on K9 barrel
The 11.5″ K9 barrel has an upgraded 11-degree crown that was carried over from the Purebred series and can be purchased as a standard barrel or with a cookie engraved on the end. [Photo credit: Rosco Manufacturing]

K9 11.5” Barrel Specs

  • Barrel Length: 11.5”
  • Barrel Weight: 25.47 oz
  • Barrel Material: 416R Stainless
  • Barrel Caliber: 5.56 NATO
  • Barrel Profile: Continuous
  • Twist: 1/7
  • Barrel Thread: 1/2×28
  • Barrel Gas Block Size: 0.750
  • Gas System Length: Patrol
  • Barrel Crown: 11 Degree
  • Barrel Finish: Nitride
  • Barrel Extension Finish: Nitride

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