BCM® Standard 12.5" Carbine Complete Upper Receiver Group (Kino Configuration)

MSRP: $750.40
Your Price: $615.40
(You save $135.00 )
Maximum Purchase:
5 units
5.56 NATO
Barrel Length:
Barrel Style:
Stock Status:

Out of stock

About the BCM® Standard 12.5" Carbine Complete Upper Receiver (Kino Configuration)

  • Carbine Gas System, to be used with Mid Length Handguards
  • Considered to be one of the optimal general purpose SBR configurations
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Made by Bravo Company MFG, Inc. (BCM®™) These Barreled Upper Receiver Groups are designed for shooting professionals 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 Flat Top Receiver & Barrel Extension (USGI)

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® uppers 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 and private security personal for its superior ballistics.

Mil-Spec 11595E - Barrel Steel

BCM® barrel steel is Mil-Spec per MIL-B-11595E. 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. The 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 on the USGI M16/M4 rifles 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 ammo.

Mil-Spec F-Marked Forged Front Sight Bases

Mil-Spec for rifles issued to the troops require taller front sight bases on all flat top AR rifles. Many commercial offerings use M16A2 height front sight bases on all of their barrels regardless of what type of upper it is installed on.
As a result, owners of rifles and carbines with the flat top receiver configuration can have problems getting a proper 'zero' for elevation with Mil-Spec back up iron sights. As all of the BCM® uppers are built for flat top uppers, all have the proper Mil-Spec F marked front sight base to insure the correct height for iron sight zeroing when using military iron sights. Mil-Spec taper pins secure the forged front sight base with the sling swivel secured by tubular rivets.

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.***

13 Reviews

  • 5
    12.5 kino upper

    Great upper at fair price. Running H2 buffer on SBR lower, perfect function .Went old school with Aero Precision GI style handguards ,ARMS 40 rear sight and MRO . So happy with build going to order a BCM 14.5 with light barrel when back in stock.

  • 4
    Great upper

    Built well, accuracy great, perfect gas impulse when using an A5H4 buffer and LMT Enhanced BCG.

    The only negative I have is that the front cap was too close to the receiver end when used with a Daniel Defense Omega free-float drop in rail. It was touching the handguard and obviously making it no longer free floating. I have Omega rails on 2 other rifles and both of them have an identical gap between the front cap and the handguard, which makes me believe that it’s too close on this upper.

    I fixed it by taking a file to it and now the rail is properly free floated. I tested a standard 2 piece plastic and they still fit, so it’s a non destructive modification.

    Everything else is perfect. It was also only 2 clicks off when I slapped a carry handle on it, so they did a great job properly aligning the FSB.

    May take some manual fitting if you’re using a Daniel Defense Omega rail but otherwise it’s 10/10!

  • 5
    What did you expect?

    I bought it. It is of very high quality, and functions flawlessly. I'd heard good things about BC-USA INC. and was not disappointed.

  • 5
    12.5” Upper review

    Customer service was outstanding. Emailed a question about the 12.5” upper and I received a response with hours, not the next day or several days, the same day within a couple hours! The upper was awesome as to be expected. Fast order processing and shipping. Completely happy with my purchase. Will be ordering again from BCM!

  • 4
    Great upper, limited shipping options.

    I'm very pleased with this BCM upper. Mine is running with the VLTOR A5 buffer system, SBA3 brace, and a Toolcraft bolt.
    The first ~500 rounds have cycled flawlessly, accuracy is great. I'm quite satisfied with my purchase, which meets my expectations. I can't wait to get more trigger time with the thing!

    My chief dissatisfaction is the limited shipping options BCM provides- anything over $400 ships by UPS Ground, and the website offers no alternative. I would have paid a premium to use another shipping option, and wish expedited shipping was available.

  • 5
    Customer review

    Upper looks solid, its the first pice for a project so have not done anything with it yet. I dont expect any problems, great looking product. Would buy again

  • 5
    12.5 Kino Configuration Upper

    Great product, shipped fast and great customer service.

  • 5
    12.5 kino upper

    Excellent fit and finish. If this is what I can expect to see from all of BCM's products I will be buying much more.

  • 5

    I ordered this upper on Saturday 02/25/2017 and just received it today 03/01/2017. The shipping was fast and customer service I received was second to none. I will be shooting this upper this weekend and very excited about that. Thank you BCM for sending the cool swag and awesome products you guys push out.