AR-15 Barrels

Built to Mil-Spec using USGI NATO chambers and button rifling giving you a standard effective point and area target range that you would find on a military-issued rifle in the same configuration.

Originally pioneered by European armorers, hammer-forged barrels feature a honed interior finish and a tungsten carbide mandrel with the entire rifling pattern ground in relief onto its surface. The resulting barrel is both extremely durable and highly accurate. As with all BCM barrels, the BCM BFH series of barrels are made in the USA.

Machined from 410 stainless steel with a 556 NATO Match Chamber. Featuring hand-lapped bore and chamber, 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter an excellent balance of weight and accuracy. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other precision barrels.

Government profile barrels have a .750 gas block diameter; lightweight barrels use a .625 diameter gas block. Lightweight profile barrels are similar to government profile up to the handguard cap and then slimmer from the gas block mounting area forward.

• ELW (Enhanced Lightweight)
• ELWF (Enhanced Lightweight Fluted)
• EMWF (Enhanced Medium Weight Fluted)



BCM proprietary tapered profiles eliminate the handguard cap shoulder and feature a sleek, light, yet durable barrel, in both standard button rifled, and BFH cold hammer forged barrels. The tapered profile keeps the barrel heavy where most of the heat is generated, and lighter where it is less.

With barrel weight at the rear of the barrel, the front end of the carbine feels lighter and can be driven faster from target to target. The ELWF and EMWF barrels are fluted for a more rigid design and offer a bit of weight savings. BCM’s enhanced lightweight uses a .625 gas block diameter and medium-weight barrels use a .750 gas block diameter.

Rifle length systems were designed and fielded by the US Military in the original AR10, M16, M16A1, M16A2, M16A3, M16A4, and MK12. Optimized for 18-20" long barrels, this gas system reduces recoil impulse and delivers a smoother operating and more controllable weapon system.

Mid-length systems deliver the same compact size of a carbine, with less overpressure and recoil as opposed to the USGI M4 Carbine gas system. Giving the smoother running platform. The mid-length system can also allow for a longer handguard and by extension, a longer iron sight radius for improved accuracy when engaging with iron sights.

Carbine length gas systems were designed and originally fielded by the US Military in the XM177 carbine. The carbine length system was designed to be as compact as possible and reliably cycling rounds. The carbine length gas system is still in use, powering M4, M4A1, and MK18 carbines issued to members of the US Military today.

Pistol-length gas systems were designed to be even more compact than the carbine-length gas system for improved maneuverability, comfort, and better concealment. AR Pistols are also close to rifle length with a silencer, making them popular for suppressor setups.

BCM barrel steel is Mil-Spec per MIL-B-11595E. This grade (CMV) of steel is a Mil-Spec steel used in the USGI M16 family of rifles; it is stronger and will last longer than the typical barrels offered in the commercial market.

The Mil-Spec grade steel gets its additional strength and rigidity from an increase in carbon and/or vanadium in the alloy. This will offer increased barrel life and performance through use in all types of extreme environments and temperatures.

410 stainless used in BCM AR-15 barrels is harder and more corrosion resistant than the conventional 416 stainless found in most barrels on the market. 410 stainless steels provide the best balance of weight and accuracy, and are less likely to rust and corrode making them highly durable.

Every BCM chrome-lined barrel uses the same Independently Certified Mil-Spec 11595E Barrel Steel (CMV) used in the USGI M16 family of rifles. Built to perform in extreme environments, BCM barrels are stronger and more durable than typical commercial barrels due to high concentrations of carbon and/or vanadium in the alloy.

A chrome-lined bore and chamber are now a worldwide standard in the industry for an AR-15 rifle. The chrome bore and chamber is harder than the typical barrel steel and on the USGI M16/M4 rifles will aid in chambering, extraction, and reliability. It increases velocity and also resists fouling and corrosion from extended use in the field. This gives the end user a longer barrel life with less required time performing maintenance and cleaning.

The exterior of BCM barrels are parkerized with a manganese phosphate finish, per Mil-Spec, to create a porous surface to absorb oil to resist corrosion from the elements. Each barrel finish is applied before the sight is installed to ensure the entire exterior is coated before installation.

SS410 BCM barrels with DLC coatings subdue the natural shine of the stainless steel for a black lower reflective surface. The coating is only a few microns thick and provides increased wear and corrosion resistance from the elements. Coatings are applied prior to assembly to provide full exterior coverage of the barrel.