BCM® Standard 12.5" Carbine Complete Upper Receiver Group w/ MCMR-10 Handguard

MSRP: $948.35
Your Price: $725.35
(You save $223.00 )
(47 reviews)
SKU:
BCM-URG-12-MCMR10
Maximum Purchase:
5 units
Caliber:
5.56 NATO
Barrel Length:
12.5in
Barrel Style:
Standard
Handguard:
MCMR-10
Right hand side view of BCM® Standard 12.5" Carbine Complete Upper Receiver w/ MCMR-10 Handguard
Stock Status:

About the BCM® Standard 12.5" Carbine Complete Upper Receiver w/ MCMR-10 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.

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 ammunition. 

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.***

47 Reviews

  • 5
    First time building a rifle, thankful i got a BCM

    Review body is empty

  • 5
    Feedback

    The order was received, not assembled yet.
    It would be helpful that if the shipment requires a signature, that it be stated up front. had a 90 minute round trip to get from UPS because deliver times were not when I would be at location.

  • 5
    Great

    Great upper. Bolt was missing from order, but BCM sent it out as soon as I notified them. Great service.

  • 5
    AR upper

    Not much to say. If you looking at BCM items you know quality and you get exactly that when you open the box. Could not be more happier and will be coming back for more.

  • 5
    Love It!!!!!!!! Couldn’t have picked better upper

    The gun runs like a sweet dream and is as smooth as butter to make it the most reliable and would trust my life and property to the upper and reliability therefore my favorite gun I Own?

  • 5
    12.5 Upper

    Could not be happier with the quality of BCMs build. The upper shoots 1.25 MOA with m193 and a trijicon 1-4. 300 rounds through it so far no hiccups, but I will be taking it to a class this month to put 1500 through it. Insanely fast shipping and quality workmanship from BCM. Buy with confidence.

  • 5
    BCM 12.5" upper smokes paper and steel

    Finally saved up to get my 12.5" upper because I watch too much Garand Thumb at work. I built it out with most BCM parts and slapped an old eotech 512 and got to take it to the range for 5-25m carbine drills the very next weekend. Fitment is amazing, matches well with all 4 different-manufacturer milspec lowers i own. While zeroing with cheap ball ammo, i had two 4-round groups with all holes touching. Recoil/timing felt great, I trust this rifle with my life.

  • 5
    12.5 MCMR

    So far it’s amazing, perfect balance of dwell time and reliability. Very happy with my purchase. Strongly suggest if running unsuppressed.

  • 5
    Rad.

    No surprises coming from BCM. My order arrived fast, clean, and with tons of swag. Love the 12.5. With a variable power optic on top, it make a a great, so anything setup.