BCM® MK2 Standard 16" Mid Length Complete Upper Receiver Group w/ MCMR-15 Handguard

MSRP: $995.39
Your Price: $772.39
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5.56 NATO
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BCM® MK2 Standard 16" Mid Length Complete Upper Receiver w/ MCMR-15 Handguard

All BCM® Upper Receiver Groups with a MCMR Handguard Include:

  • One 3" Picatinny Rail Section
  • One BCM MCMR 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.

Featuring BCM’s Patented MK2 Upper Receiver

This proprietary design offers enhanced rigidity over the USGI product.  The increased rigidity limits barrel deflection which aids in consistency/accuracy.   Less flex also reduces premature damage, wear, and failure of bolt lugs from misalignment.   A gas expansion chamber is machined above the charging handle track, combined with dual vents machined at the rear (each side, above charging handle latch) help to redirect and vent gas away the shooters face. U.S. Patent Numbers: 10670355, 10677549, D888182

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. 

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.

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.***

8 Reviews

  • 4
    Good upper receiver

    I loved how the upper receiver has the wait balanced throughout the barrel. Although the upper receiver is very heavy. I feel the BCM did a great job of distributing the way. However knowing what I know now I would probably have gone with a smaller Mlock rail to shave a couple of weight off.
    The 3X3 charging handle did not disappoint I love it!! Although , I was concerned of my boat carrier group because of the finish was scratched off at the bottom.

  • 5
    Love both upper may get one more later

    Great product

  • 5
    For my first build on short supply everywhere.

    Absolutely a great complete upper and a high quality bolt carrier fully assembled delivered in a day and a half. Thanks for a great product. Zeroed in and put 200 rounds through first time out.

  • 5

    The BCM, MK2 Standard 16" Mid Length Upper Receiver Group w/ MCMR-15 Handguard is amazing! The quality is worth the price. I would take this into combat anyway! Run to Danger RPD!

  • 5
    MK2 Standard Mid length complete upper

    I normally build my own AR's because I'm a bit picky on the details that makes a great long running rifle.
    So far this upper has been superb. I run guns hard and this upper is holding up great. The locking nuts on the rail are a big plus.

  • 5
    Dead Solid Perfect

    Of all the upper assemblies I've checked out, this was just the obvious choice. Order process was quick and easy. Ordered on the 2nd, arrived on the 9th. Packaging and swag was awesome. I promptly dropped my new Recce 16 upper on an FN lower for a snug, perfect fit. Test fired next day to zero and check balance/weight, and to say I am impressed would be an understatement. Through several bullet grains and loads this rifle functions flawlessly, with a consistent ejection pattern, and a very soft recoil pulse. Once zeroed, unmagnified, at 50 yards I was putting rounds on top of rounds without trying to hard. It's clear to me why this setup has been so popular. I've used and trained with a pretty broad spectrum of rifles, and this one just feels different; better. It's something you can hardly put into words, it just needs to be experienced. For anyone looking for a rifle or upper that delivers better than "minute of bad guy" accuracy and consistency while still able to "run and gun," look no further. With the QC, overall customer service, and the diverse product offering, I'll probably never buy anything but BCM again.

  • 5
    Amazing quality. Very comfortable and light weight

    Looks good and feels good. Definetly recommend.

  • 5

    High quality parts as always with bcm.