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AR-15 7.5" Heavy Barrel, .300 Blackout,1:8, Parkerized

MPN: 1311-B300PHB7.518(P)  |  UPC: ITM2118


Premium Grade Parkerized AR-15  Barrel, 7.5" Heavy Barrel .300 Blackout  Barrel with a 1 in 8 twist
Gas port drilled for pistol length gas set up and threaded for comp.
Barrel Extension in rear with M4 feed ramps... It has a .750 gas block diameter ready to install into receiver.
.300 Blackout caliber

Don't forget the AeroShell 33MS Mil Spec Armorer's Grease!

This is a premium grade 7.5" Parkerized AR-15 pistol barrel from a highly respected U.S. contractor/barrel manufacturer. These premium barrels are renowned for their deep, crisp, and consistent rifling and extreme accuracy. When it comes to AR-15 barrels these Beautiful M4 Contour beauties are the granddaddy of them all.

  • 1 in 8 twist, gas port drilled at .125 and set up for pistol length gas system with a .750 gas block diameter
  • Barrel is chambered as .300 Blackout
  • They are Drilled, Reamed, Rifled, Turned, and if Applicable, fluted on CNC Machines. All our Finished Barrels go through a 100% Inspection Process.
  • Inspections Equipment includes CMMs and Air Gauges for the Bores.
  • Inspections Equipment includes CMMs and Air Gauges for the Bores.

These barrels are made from 4150 Chrome Moly Vanadium and are rated at a barrel life of approximately 150,000 rounds. They are very top end. 

They are not chrome lined as most AR15 barrels are not. Chrome lining on modern rifles is typically used where there is a high probability of corrosive ammo being used such as AK type rifles chambered for foreign calibers... 

Since chrome lining may slightly affect accuracy, and since most AR-15 rifles are designed with accuracy as a benchmark, 
and since virtually all .223 / 5.56 NATO is non-corrosive...most AR manufacturers do not chrome line barrels. 




Additional Length: 7.5
Profile: Heavy Barrel
Twist: 1:8
Finish: Parkerized
Material: 4150 Chrome Moly Vanadium
Thread Pitch: 5/8 x 24
Caliber: .300 Blackout
Feed Ramp: M4
Gas System: Pistol
Gas Block System:0.750
Gas Hole Diameter:0.125
SKU ACC-B300PHB7.518-P-178
Country of Manufacture United States
License Requirement None
Manufacturer US Contractor
Mfg. Part Number 1311-B300PHB7.518(P)
Caliber/Gauge .300 Blackout
Action No
Barrel Length 7.5
Barrel Twist 1:8
Barrel Bore Type No
Barrel Finish Parkerized
Barrel Fluting None
Barrel Profile Heavy
Mount Type No
Beam Color No
Firearm Fit No
Threaded Barrel No
Condition New
Free Shipping No
Weight 1.16 Lbs

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