Rosco Manufacturing K9 11.5" 5.56 Hybrid 1:7 Twist Black Nitride Patrol Barrel - K9-115-HY-DUFFY-556-7-PT
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Rosco Manufacturing K9 11.5″ 5.56 Hybrid 1:7 Twist Black Nitride Patrol Barrel
The K9 11.5 offers a proprietary patrol-length gas system that is smoother than carbine-length and more reliable than mid-length. It features an optimized gas port that runs reliably suppressed and/or unsuppressed. The K9 continuous taper is the most effective profile for dissipating heat from hard use. With the weight shifted to the back of the barrel, modern attachments on the front create a perfectly balanced and better-handling rifle. Updated target crown carried over from the Purebred series with improved harmonics, fit, and finish. We recommend a minimum handguard length of 10″ with this barrel.
NOTE: Includes patrol length gas tube
Specifications
- Barrel Length: 11.5″
- Barrel Weight: 25.47 oz
- Barrel Material: 416R
- Barrel Caliber: 5.56
- 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
| Weight | 25.47 oz |
|---|---|
| Finish | Nitride / Melonite |
| Barrel Profile | Continuous |
| Cartridge Compatibility | 5.56 NATO |
| Gas Block Journal | 0.75 |
| Barrel Length | 11.5 |
| Gas System Length | Patrol |
| Platform | AR-15 |
| Twist Rate | 1:7 |
| Muzzle Thread Pattern | 1/2×28 |
| MPN | K9-115-HY-DUFFY-556-7-PT |
| UPC | 850039693083 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
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