Centurion Arms Barrels and Tabbed Gas Blocks

Centurion Arms utilizes superior Chrome Lined, Hammer Forged barrel blanks and offers their proprietary Keyed notch for their Tabbed Gas Blocks.  This offers perfect indexing and alignment and helps secure the gas block without the need to cross pin. 

Centurion Barrels are dimpled for both set screws and phosphate coated over the machining to help prevent corrosion aroudn the set screws.  This assists with servicing the barrel/gas block down the road should that ever be needed for high volume firing schedules.  

Read on for more details on Centurion's barrel technology

Cold Hammer Forged Barrels
Hammer forging is a process in which a drilled, reamed and honed blank has the rifling formed into it by placing the barrel blank on a mandrel that has the rifling ground into its outer surface. The blank and mandrel are then placed between two opposing power hammers and the blank is beaten around the mandrel leaving the rifling pattern in the barrel. This process leaves an extremely smooth and consistent surface on the inside of the barrel, that lends itself to excellent accuracy. The forging process also work hardens the barrel steel causing a very durable and much longer lasting barrel. Centurion barrels have a slight taper to the bore during the hammer forging process to ensure better accuracy. Centurion's hammer forged barrels are the best choice for shorter range, combat shooting style and high round counts.

Chrome lined chamber and bore
The hard chrome used to coat the chamber and bore are harder than the barrel steel itself. This aids in longevity and also reduces fouling and corrosion often seen in austere field conditions. Chrome also aids in chambering, extraction, and overall reliability of the weapon. Thus, giving the operator a more reliable weapon with less maintenance. Centurion barrels have chrome lining applied to twice the thickness of standard small arms barrels.

Barrel steel
The steel used in Centurion hammer forged barrels was specifically developed as machine gun barrel steel to help increase the barrel life under prolonged rigorous firing schedules.

Twist rate
Centurion specs a 1/7 (1 turn in 7 inches) twist rate in all our barrels. This is the best overall twist rate for this weapons system. The 1/7 twist will stabilize any of the light weight 5.56 bullets as well as any other twist. This twist will also stabilize the newer heavier bullets that are being used allowing the operator to get the best performance out of this weapon system.

Chamber
Centurion uses a true 5.56 chamber in their barrels allowing the operator the ability to use the higher pressure military ammunition on the market and helping to enhance reliability.

Feed ramps
Centurion barrels are supplied with extended M4 style feed ramps to enhance overall feeding and weapons reliability.

Finish
The barrel finish is a manganese phosphate finish (Mil-Spec A-A-59267). This finish allows for better absorption of oils to help prevent corrosion. These barrels are all finished prior to any gas blocks being mounted to ensure the entire surface is covered to maximum protection even under the gas block.

HPT/MP inspected
HPT(high pressure test) is a process where a proof load rated at 70,000 psi, far exceeding a normal round, is fired trough the barrel then the barrel is MPI (Magnetic Particle Inspected) to detect any flaws in the barrel steel from the proof load. These are standard quality assurance tests performed on all our hammer forged barrels to ensure the highest quality product.