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

MSRP: $962.65
Your Price: $747.35
(You save $215.30 )
(45 reviews)
SKU:
BCM-URG-Std-20-KMR-A-15
Caliber:
5.56 NATO
Barrel Length:
20in
Barrel Style:
Standard
Handguard:
KMR-A15
BCM® Standard 20" Complete Upper Receiver Group w/ KMR-A15 Handguard
Stock Status:

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 per Mil-Spec. 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
    Rifle

    Haven't had a chance to use it, but I'm am really excited.

  • 5
    Purchased complete upper

    I was having a difficult time finding a complete upper that met the specs I wanted. A friend suggested your business and quickly I found exactly the length and twist I wanted. It also allowed for different charging handles I could choose from.

  • 5
    BCM 20" KMR standard upper

    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!

    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

    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 .

  • 5
    Purchase and Product Experience

    Not only was the barrel high quality for an excellent price, BCG included tons of promo material like a hat and stickers and even included a tool to use with the rail system.

    The overall purchase blew me away, and I am most definitely making another order within the week. BCG just got a permanent customer.

  • 5
    AMAZING to say the least.

    This upper is amazing!!!!!! Lighter than I thought it would be. I am getting 1.5 -1inch groups at 100 yards with Tula ammo..... Seriously....
    With 77 grain Match grade boat tail ammo I am getting consistent .75" - .50" groups using a special gun vice sighting system at an indoor 100 yard range. This upper has outdone all my expectations.

  • 5
    So much awesome!

    This upper is just plain sick! Light, sturdy and nasty looking. Shipping was quick, ordered on Thursday morning and was delivered around noon the following Monday. Shipping box was loaded with BCM goodies. I put 40 flawless rounds of some cheap green tip through it. I love this upper. It will not be my last BCM!

  • 4
    Worth it

    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.