BCM® Standard 20" Rifle Length Barrel, Stripped

MSRP: $350.00
Your Price: $279.00
(You save $71.00 )
M4 Feed Ramp Barrel Extension (USGI)
Stock Status:

Out of stock

(.750) at Gas Block location
Approximate Weight: 2lbs 1oz.
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Life Saving Tools, by BCM®
These are stripped 20" Rifle Length Standard 11595E barrels with gas ports installed and dimpled for a strong gas block installation.
M4 Feed Ramp Barrel Extension
In developing the USGI M4 carbine as one of the primary weapons for todays infantry, some modifications were performed to the original M16 platform to enhance the reliability of the shorter barreled carbines. With the shorter carbine gas system and the increased gas port pressure, the carbine cycled faster, and at times the cycle rate could be faster than the magazine would feed ammunition. One of the modifications done to increase reliable feeding included enhancing the angle and the length of the feed ramps. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. This feature is offered on all BCM barrels.
USGI 1/7 Twist Rate
The USGI 1/7 twist rate of all of the BCM barrels is the preferred twist rate by most professional infantryman. This twist rate has proven very versatile and can effectively run the new heavier 5.56 ammo that is hugely popular with military and private security personal for its superior ballistics.
Mil-Spec Barrel Steel (Mil-B-11595E)
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.
Chrome Bore and Chamber
One of the first modifications that were made to the original M16 in the mid 1960s was the addition of the chrome lined bore and chamber. It is now a worldwide standard in the industry for a battle rifle. The chrome bore and chamber is harder than the barrel steel and on the USGI M16/M4 rifles will aid in chambering, extraction, and reliability. It increases velocity, and also resist against fouling and corrosion from extended use in the field. This gives the end user a longer barrel life with less required time in maintenance and cleaning.
Manganese Phosphate Barrel Finish
Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against corrosion from the elements. BCM barrels are phosphated before installation of front sights. This is a much more extensive assembly operation, but insures that the entire barrel is finished and protected . . .even under the front sight base.
5.56 NATO Chambers
The USGI 5.56 NATO chamber is the best choice for effective deployment, reliability, and compatibility, of higher chamber pressures of military ammo.
Government Barrel Profiles
Duty rifles are built to be carried - day in and day out. The USGI barrel profiles (often referred to as the Government Profile) enable the operator to carry their weapon for longer periods of time and deploy them faster than the heavier commercial H-Barrel counterparts. The government profile barrel is also compatible with the current M203 mounting systems.
HPT / MP Inspected Barrels
Military specifications require that barrels undergo a HPT (High-Pressure Test) load as a part of quality assurance procedures. Commonly referred to as a proof load, the M197 HPT is rated for 70,000 psi. BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444-01 (current Mil-Spec) to assure a high quality finished product. All BCM barrels are marked HP MP as our proof load marking.
Copyright 2009 Bravo Company MFG, Inc.
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

41 Reviews

  • 5
    20 inch barrel

    Looks great. Can't wait to test

  • 5
    Barrel review

    Got all my parts for new rifle built and I'm very impressed with the quality. I disassembled the BCG and cleaned the parts and lubed them up. I inspected my barrel and was impressed with the quality of the barrel. Earlier in the year I bought a blemished upper. I had to heat the upper in order to insert barrel. This is not a bad thing. This is what I look for in a build. I don't want sloppy fitting arms parts. Everything should be slick or tight. Thank you for quality professional weaponry.

  • 5
    Straight-Shooter & BCM Reliability

    BCM has a reputation for quality control. I'm confident my AR-15 parts are going to be to spec, are going to perform, and are going to last.

    This 20" barrel is no exception. I wanted to build a modernized fighting rifle instead of another carbine, and I knew this barrel would be a solid foundation. I'm completely pleased with how it performs.

    Also, BCM is pretty close to my home. They quite often ship same-day for in-stock items, so I usually end up getting my parts the next day.

    Great products and great service.

  • 5
    BCM Standard 20" Rifle length Barrel, Striped

    VERY ACCURATE.......1/2 MOA at 200 yards!
    I spent a lot of money on so called *Top Tier* barrels,
    this BCM 20" barrel matches or exceeds them all.
    Craftsmanship and QC are impeccable.

  • 5
    Govt Profile

    So it comes with a witness mark to help if you're pinning this yourself first company out of 10 or so I've seen do that that was nice. Can't speak to longevity but I'm sure it's fine because it's legit milspec and so far in my load development I have 10 shot groups within 1.25 moa at 100 yards, that's with mixed brass and 77 he sierra matchkings. Not a bad word on it, solid authentic part for an a4 build

  • 5
    BCM Standard 20” Rifle Length Barrel

    Execellent barrel, I was extremely surprised on how accurate the barrel is. At 200 yards I shot a 1/2 inch group with 55 grain ball ammunition. Extremely high quality barrel will purchase more!

  • 5
    20 inch BCM

    I put this on a Aero upper with no forward assist and a 15 kmr . Incredibly light and looks great . Worth every penny !

  • 5
    Customer review

    Review body is empty

  • 5
    Seems to be a good barrel

    Haven't installed it yet. Packaging was vet thoroughly padded and boxed.