Rosco Manufacturing K9 11.5" 5.56 Hybrid 1:7 Twist Black Nitride Patrol Barrel - K9-115-HY-DUFFY-556-7-PT
Only 3 left in stock
The K9 11.5 offers a proprietary patrol length gas system that is smoother than carbine length, more reliable than mid-length. 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. 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: COMES WITH PATROL LENGTH GAS TUBE
| 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 x 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 |
|---|---|
| Dimensions | 13.5 × 3 × 3 in |
| 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 | 850039693120 |
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.
Customer Reviews
- Reviews
- Questions
- 75gr-77gr
- gas block unsuppressed
- ball ammo
- Money
- need
- place
- rounds
- barrel
United States
Good barrel.
First 30 rounds was all over the place, had me worried, started settling down shortly after, no need for an adjustable gas block unsuppressed, ended up totally opened up. Only was able to test 55gr ball ammo this time, bet 75gr-77gr would shoot great in it. All in all great barrel especially for the money.
