BCM® Standard 20" Upper Receiver Group w/ KMR-A15 Handguard

MSRP: $887.65
Your Price: $697.35
(You save $190.30 )
(38 reviews) Write a Review
5.56 NATO
Barrel Length:
Barrel Style:
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Out of stock

All BCM® Upper Receiver Groups with a KMR-A Handguard Include:

  • One 3" Picatinny Rail Section
  • One BCM KeyMod Sling Mount
Bravo Company builds:  Life Saving Tools™
Manufactured by Bravo Company MFG, Inc. (BCM)
These Barreled Upper Receiver Groups are designed for shooting professionals and responsible civilians with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.
As a note: BCM barrel components are parkerized separately before assembly. Prior to shipping, all BCM upper receiver groups are test fired for function, laser bore sighted with a Milspec carry handle for sight alignment within Mil-Specs, and then batch samples are test fired for accuracy. As such, the upper receiver group will show handling marks consistent with these quality control procedures.
M4 Feed Ramp Barrel Extension and Upper Receiver
In developing the USGI M4 carbine as one of the primary weapons for today's 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 upper receivers and all BCM barrels.
T-Marked Upper Receiver
The contemporary M16/M4 rifle is built around the concept of modularity. All of the BCM flat top uppers feature a USGI type laser etched T-marks to provide addressing for the remounting of tactical accessories such as optics, laser sights, etc. This enables the weapon platform to be easily configured and then accurately reconfigured for each specific mission.
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, private security personal, and personal defense for its' superior ballistics.
Mil-Spec Barrel Steel (Certified Mil-B-11595E)
BCM barrel steel is Mil-Spec per MIL-B-11595E, and is independently certified. 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. This 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 1960's 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 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 or high quality personal defense ammounition. 

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 2019 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.***

38 Reviews

Write a Review
  • 5
    BCM 20" KMR standard upper

    Posted by Dan M on Apr 26th 2016

    I purchased this upper for what I believe to be a great price considering BCM's reputation for quality control and customer service. It was shipped promptly and arrived in good condition with various stickers and goodies.

    I am quite pleased with the light weight, properly staked BCG, and the mod 5 charging handle. I have yet to wring the barrel out for accuracy but I have high hopes considering what I have seen so far.

    I found the rail to be extremely solid and light for its length. The locking mechanism is unique and creative, and I believe it to be superior to most of its competitors. I understand that production is outpaced by demand at this time, but I would like to see an M-Lol version in the future as well.

    Overall my purchasing experience was great, and my questions about product specifics and availability were answered by customer service promptly and professionally. Overall a great experience.

  • 5
    Great Value!

    Posted by michael daly on Apr 26th 2016

    Just got back from the range after running 200 rounds through my new upper. I love it. It has the feel of a race gun and the mil spec reliabilty that BCM is know for. If you want a 20" upper get this one, and get the BCG and charging handle too. As a package, you can't get better for the money.

  • 5
    BCM Standard 20" upper w/BCM KMR Alpha 15" Handgu

    Posted by Jeffrey Stapenhill on Apr 26th 2016

    The fit and finish and first time out shooting it was exemplary ! Excellent upper and the KeyMod 15" handguard/rail has the best feel/grip that I have ever shot with, I think it's 1 .5 inches wide. Shipping was fast considering I live on the west coast and also in the shipping box was an assortment of BCM goody's , great stuff and a great company .

  • 4
    Worth it

    Posted by PM612 on Mar 14th 2016

    Only giving 4 stars because I have not fired it yet. When I opened the package I was blown away at the quality of the KMR rail. The upper snapped to my lower (spikes zombie) flawlessly. They sent a ton of swag and a few magazines for reading. First time ordering from BCM, and just blown away by quality.

  • 5
    BCM 20in

    Posted by anonymous on Feb 16th 2016

    I am very please with BCM service. Product shipped very fast. I'll let you know what I think of it once I get it pinned to a lower and take it to the range.

  • 5
    Awesome upper.

    Posted by Dave Roberts on Feb 13th 2016

    This was the upper I used to complete my fixed stock AR-15. This 20" upper with the KMR is lighter than my 14.5 pinned AR-15; that was a surprise. The only thing I wish they included in the box was the accessories that come with a stand alone KMR hand guard. Other than that very small thing, BCM is now my go to AR-15 store.

  • 5

    Posted by Hunter Garrison on Feb 13th 2016

    BCM is easily the best company to buy AR-15 parts from. Im getting less than an inch groups at 100 yards. Not only do they have great products but sent me a free hat with my upper. That right there is them going the extra mile for a customer. Thank you so much for great products!

  • 5
    Complete 556 upper 20”

    Posted by Samuel David Manzano on Jan 21st 2016

    Great product at a great price!!! Product was shipped extremely quickly and the little extras in the box made my day! Thank you for the overall great customer serves. You have gained a customer for life. Thank you again!!

  • 5
    A great upper

    Posted by Steven A. on Jan 2nd 2016

    I bought this almost on a whim. I was very surprised to find out how light this upper was. My brother's 18" with quad rail weights almost twice as much. I bought this with the intention of shooting 500+ yards so accuracy is top priority. All I had laying around was some cheap back up sights and 55gr ammo. Grouped about 3 inch at 100 yards standing (With $15 sights that had a front post that completely covered the target, so I'm very happy with that). When I get some glass on it and some proper ammo we'll see what it can really do. Oh, and I didn't have a single malfunction. Every round went down range with out a single hiccup. (About 200 rnds)