BCM® Standard 20" Rifle Length Barrel, Stripped

MSRP: $325.00
Your Price: $254.00
(You save $71.00 )
(30 reviews) Write a Review
M4 Feed Ramp Barrel Extension (USGI)
Stock Status:
(.750) at Gas Block location
Approximate Weight: 2lbs 1oz.
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Professional Grade Weaponry, 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.***

30 Reviews

  • 5
    BCM Standard 20" Rifle length Barrel, Striped

    Posted by anonymous on Apr 9th 2019

    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
    Customer review

    Posted by Michael Nuss on Jan 17th 2018

    Review body is empty

  • 5
    Seems to be a good barrel

    Posted by Rich Metzger on Oct 22nd 2017

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

  • 5
    BCM Standard 20" Rifle Length Barrel, Stripped

    Posted by Jerry Stejskal on Oct 6th 2017

    Very quick delivery. Product was very well packaged. Thanks for such quick service

  • 5
    20 inch barrel

    Posted by greg long on May 20th 2017

    great product. top shelf shelf stuff.

  • 5
    20" GP Barrel

    Posted by Charles Millan on Dec 28th 2016

    Received the barrel I ordered and was highly impressed with the quality workmanship and detail to proper packaging...looking forward to completing my build.

  • 5
    Great purchase!

    Posted by anonymous on Dec 28th 2016

    Very happy with Barrel - BCM has great service and quality parts

  • 5
    Perfect !

    Posted by Jason Schultz on Dec 28th 2016

    I wanted to build a 20" rifle and was very impressed with the quality of this barrel. It fit my Aero Precision upper perfectly, the feedramps on the upper and barrel lined up like they were made for each other. The dimple for the gas block made assembly quick and easy. My first outing with this rifle, using my 3x9 scope, gave me a 1/2" grouping at 50 yards. It was amazing. My next build (16"), I'm definitely using another BCM barrel.

  • 5
    bcm std. 20" rifle barrel, stripped.

    Posted by Edith Morrison on Dec 27th 2016

    great service, second order from you and will order from you again.