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

MSRP: $962.65
Your Price: $747.35
(You save $215.30 )
5.56 NATO
Barrel Length:
Barrel Style:
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Out of stock

About the BCM® Standard 20" Complete Upper Receiver w/ KMR-A15 Handguard

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

  • One 3" Picatinny Rail Section
  • One BCM KeyMod Sling Mount

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.

Shop Related Products:

Want to see more upper receivers? Click the links below to view more BCM® AR complete uppers!


Bravo Company builds: Life Saving Tools™
Copyright 2023 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.***

45 Reviews

  • 5
    BCM 20" Upper with Alpha Handguard

    Nice finish and good fit to my lower receiver

  • 5

    Bravo company doesn't make anything less than 5 star quality!!!!!! Now that we have that out of the way, this thing is incredible! I can definitely say that I have more mobility and control with this 20" compared to my 16" Aero precision. Now, that's not to say that aero precision isn't good, because they are. I'm just saying that BCM is better haha! I love it and it's worth the money! You will not have any sort of buyers remorse with this purchase!

  • 5
    20" Upper 15" hand guard

    Shot 300 rounds through it so far and it works great. Excellent customer service and shipping. Keep up the good work!

  • 5
    Great Complete Upper

    Slapped a 3x fixed power scope on it and took it out to the long range. I was hitting 400 yard steel with every 55gr round in the magazine. Can't wait to try out heavier ammo in the 1:7 twist. Solidly built and cleans up nicely. Thanks Bravo Co!

  • 5
    Look no further

    Being distracted by first rate, no compromises, quality, it is easy to lose sight of what a bargain BCM products are. I have built two rifles around BCM 20" inch uppers with 15" KMR-As. No regrets at all. I defy anyone to get an equal product at a lower price.

  • 5
    BCM 20" Upper

    This was a great purchase. Fit and finish are excellent and it was a real joy to shoot at the range.

  • 5
    Amazing Upper

    The weight was the first thing that really blew my mind. The craftsmanship is impeccable! These uppers are truly custom as the fit and finish is perfect. The KMR hand guard is 1/3 the size of normal hand guards and a natural fit to the hand. I added my gunslinger charging handle and topped it off with a Vortex StrikeEagle 1x6x26. Perfect rig! The ball cap is awesome, posters, stickers etc.. Thank you BCM I am extremely happy!

  • 5
    Excellent Upper

    Fit and finish on this upper was excellent, blown away at the feel and small size of the KMR rail, will be getting one for my BCM 14.5 middlength now.

  • 5
    Fell in love!

    Yes I fell in love with this upper for my SPR setup. BCM shipped my order in the same day! Not only am I amazed at how light weight it is, it is also very slim (not a bulky rail), finish is excellent, and you can just feel the quality. Looks and performs just as advertised if not better. Even the oil/grease applied for shipping smelled great.