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:

Out of stock

(.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
    nice barrel

    Posted by Chad Vesel on Dec 27th 2016

    I was excited to see that the standard 20" barrel was capable of shooting 1 MOA using 25.8 gr Accurate 2520, 75gr BTHP, LC 01 brass, and CCI 450 primers.
    I am satisfied.

  • 4
    Barrel 20"

    Posted by Eric Buckner on Oct 13th 2016

    Looked at a lot of places before I decided to get the bcm barrel. It has not let me down yet. Also the shipping was pretty fast if that's something you care about.

  • 5

    Posted by Troy von blankenburg on Sep 22nd 2016

    Every piece was aligned and machined perfectly. 256 rds, perfect accuracy, barely had to adjust a brand new scope to sight in, not one cycling malf or weird catch or reason to use forward assist.

  • 5
    20 inch barrel assembly

    Posted by shawn on Sep 22nd 2016

    Top quality barrel I'd trust my life on. No reason to cut corners. Fit and finish look great. Plan on free floating this barrel. Im confident it will exceed my expectations.

  • 5
    Awesome Barrel

    Posted by Ric B on Sep 22nd 2016

    Everything from BCM is top notch as usual and finding a quality 20inch barrel is a tough proposition. Everything assembeld to it like a dream and will expect great accuracy from this barrel as well.

  • 5
    Excellent for my build

    Posted by Kyle Maryeski on Sep 22nd 2016

    I now have a sexy BCM A4. All I've had time to do is zero with the carrying handle rear sight. It took all of nine rounds with a milspec zero target. I own plenty of BCM rifles so I expect great combat accuracy. I'd take any of my BCM's back to Iraq or Adghanistan and trust my life those of my buddies on it.

  • 5
    Gas block

    Posted by Brennan Cillian on Apr 26th 2016

    What size GB does it take?

  • 5
    BCM Standard 20 "5.56 Stripper Barrel

    Posted by Clarence R. Sheffield on Mar 14th 2016

    Totally 100% pleased with this new barrel. It arrived approximately only three days after ordering,, that's hard to beat. I wanted a 20 inch barrel mainly for deer hunting, I think this would totally work out for the upper I'm building, thanks bravo Company and I will be ordering more from you guys 👍👍

  • 5
    Best barrel for the money.

    Posted by scott arney on Feb 1st 2016

    There is nothing to say about these barrels that hasn't already been said. I trust BCM quality control. Last 3 barrels I used were all BCM from different batches (hp/mp stamping slightly different depth and texture of finish) and they all zeroed less than moa at 50 and solid 1-1.5 at 100 when I didn't screw it up. All were 16" free floated using Geissele ssa or ssa-e triggers.